diff --git a/README.md b/README.md
index 7337f9a3c9..3a73f8ac9f 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Ethereum
 
 Ethereum Go Client © 2014 Jeffrey Wilcke.
 
-Current state: Proof of Concept 5.0 RC6.
+Current state: Proof of Concept 5.0 RC7.
 
 For the development package please see the [eth-go package](https://github.com/ethereum/eth-go).
 
diff --git a/ethereal/assets/samplecoin/samplecoin.html b/ethereal/assets/samplecoin/samplecoin.html
index 3f8eacc00a..d47c6323c5 100644
--- a/ethereal/assets/samplecoin/samplecoin.html
+++ b/ethereal/assets/samplecoin/samplecoin.html
@@ -9,7 +9,7 @@
 
 <script type="text/javascript">
 
-var jefcoinAddr = "681fd48ffa236549fbcd16bdf9f98bb541a7f742"
+var jefcoinAddr = "739105c31705038744d190332e3a07c8fea8a9eb"
 var mAddr = ""
 
 function createTransaction() {
diff --git a/ethereal/config.go b/ethereal/config.go
index e4bdb0a000..817befc2c8 100644
--- a/ethereal/config.go
+++ b/ethereal/config.go
@@ -33,7 +33,7 @@ func Init() {
 	flag.StringVar(&OutboundPort, "p", "30303", "listening port")
 	flag.StringVar(&DataDir, "dir", ".ethereal", "ethereum data directory")
 	flag.StringVar(&ImportKey, "import", "", "imports the given private key (hex)")
-	flag.IntVar(&MaxPeer, "x", 5, "maximum desired peers")
+	flag.IntVar(&MaxPeer, "x", 10, "maximum desired peers")
 	flag.StringVar(&AssetPath, "asset_path", "", "absolute path to GUI assets directory")
 
 	flag.Parse()
diff --git a/ethereal/ethereum.go b/ethereal/ethereum.go
index 98fab18e3b..206971b413 100644
--- a/ethereal/ethereum.go
+++ b/ethereal/ethereum.go
@@ -39,7 +39,7 @@ func main() {
 	runtime.GOMAXPROCS(runtime.NumCPU())
 
 	ethchain.InitFees()
-	ethutil.ReadConfig(DataDir)
+	ethutil.ReadConfig(DataDir, ethutil.LogFile|ethutil.LogStd)
 
 	// Instantiated a eth stack
 	ethereum, err := eth.New(eth.CapDefault, UseUPnP)
diff --git a/ethereal/ui/ext_app.go b/ethereal/ui/ext_app.go
index de5f15db6b..d1a256cdba 100644
--- a/ethereal/ui/ext_app.go
+++ b/ethereal/ui/ext_app.go
@@ -18,14 +18,16 @@ type AppContainer interface {
 	NewBlock(*ethchain.Block)
 	ObjectChanged(*ethchain.StateObject)
 	StorageChanged(*ethchain.StorageState)
+	NewWatcher(chan bool)
 }
 
 type ExtApplication struct {
 	*ethpub.PEthereum
 
-	blockChan  chan ethutil.React
-	changeChan chan ethutil.React
-	quitChan   chan bool
+	blockChan       chan ethutil.React
+	changeChan      chan ethutil.React
+	quitChan        chan bool
+	watcherQuitChan chan bool
 
 	container        AppContainer
 	lib              *UiLib
@@ -38,6 +40,7 @@ func NewExtApplication(container AppContainer, lib *UiLib) *ExtApplication {
 		make(chan ethutil.React, 1),
 		make(chan ethutil.React, 1),
 		make(chan bool),
+		make(chan bool),
 		container,
 		lib,
 		nil,
@@ -66,6 +69,8 @@ func (app *ExtApplication) run() {
 	reactor := app.lib.eth.Reactor()
 	reactor.Subscribe("newBlock", app.blockChan)
 
+	app.container.NewWatcher(app.watcherQuitChan)
+
 	win := app.container.Window()
 	win.Show()
 	win.Wait()
@@ -83,6 +88,7 @@ func (app *ExtApplication) stop() {
 
 	// Kill the main loop
 	app.quitChan <- true
+	app.watcherQuitChan <- true
 
 	close(app.blockChan)
 	close(app.quitChan)
diff --git a/ethereal/ui/gui.go b/ethereal/ui/gui.go
index aa03649989..e267dabfd3 100644
--- a/ethereal/ui/gui.go
+++ b/ethereal/ui/gui.go
@@ -55,7 +55,7 @@ func New(ethereum *eth.Ethereum) *Gui {
 }
 
 func (gui *Gui) Start(assetPath string) {
-	const version = "0.5.0 RC6"
+	const version = "0.5.0 RC7"
 
 	defer gui.txDb.Close()
 
@@ -178,13 +178,14 @@ func (gui *Gui) setWalletValue(amount, unconfirmedFunds *big.Int) {
 
 // Simple go routine function that updates the list of peers in the GUI
 func (gui *Gui) update() {
-	blockChan := make(chan ethutil.React, 1)
 	reactor := gui.eth.Reactor()
 
-	reactor.Subscribe("newBlock", blockChan)
+	blockChan := make(chan ethutil.React, 1)
+	txChan := make(chan ethutil.React, 1)
 
-	txChan := make(chan ethchain.TxMsg, 1)
-	gui.eth.TxPool().Subscribe(txChan)
+	reactor.Subscribe("newBlock", blockChan)
+	reactor.Subscribe("newTx:pre", txChan)
+	reactor.Subscribe("newTx:post", txChan)
 
 	state := gui.eth.StateManager().TransState()
 
@@ -196,21 +197,23 @@ func (gui *Gui) update() {
 		case b := <-blockChan:
 			block := b.Resource.(*ethchain.Block)
 			if bytes.Compare(block.Coinbase, gui.addr) == 0 {
-				gui.setWalletValue(gui.eth.StateManager().ProcState().GetAccount(gui.addr).Amount, nil)
+				gui.setWalletValue(gui.eth.StateManager().CurrentState().GetAccount(gui.addr).Amount, nil)
 			}
 
 		case txMsg := <-txChan:
-			tx := txMsg.Tx
+			tx := txMsg.Resource.(*ethchain.Transaction)
 
-			if txMsg.Type == ethchain.TxPre {
+			if txMsg.Event == "newTx:pre" {
 				object := state.GetAccount(gui.addr)
 
 				if bytes.Compare(tx.Sender(), gui.addr) == 0 && object.Nonce <= tx.Nonce {
 					gui.win.Root().Call("addTx", ethpub.NewPTx(tx))
 					gui.txDb.Put(tx.Hash(), tx.RlpEncode())
 
-					object.Nonce += 1
-					state.SetStateObject(object)
+					/*
+						object.Nonce += 1
+						state.SetStateObject(object)
+					*/
 
 					unconfirmedFunds.Sub(unconfirmedFunds, tx.Value)
 				} else if bytes.Compare(tx.Recipient, gui.addr) == 0 {
diff --git a/ethereal/ui/html_container.go b/ethereal/ui/html_container.go
index 4f12aaaf69..3867c03534 100644
--- a/ethereal/ui/html_container.go
+++ b/ethereal/ui/html_container.go
@@ -6,6 +6,12 @@ import (
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/go-qml/qml"
+	"github.com/howeyc/fsnotify"
+	"io/ioutil"
+	"log"
+	"net/url"
+	"os"
+	"path"
 	"path/filepath"
 )
 
@@ -15,6 +21,7 @@ type HtmlApplication struct {
 	engine  *qml.Engine
 	lib     *UiLib
 	path    string
+	watcher *fsnotify.Watcher
 }
 
 func NewHtmlApplication(path string, lib *UiLib) *HtmlApplication {
@@ -47,6 +54,59 @@ func (app *HtmlApplication) Create() error {
 	return nil
 }
 
+func (app *HtmlApplication) RootFolder() string {
+	folder, err := url.Parse(app.path)
+	if err != nil {
+		return ""
+	}
+	return path.Dir(folder.RequestURI())
+}
+func (app *HtmlApplication) RecursiveFolders() []os.FileInfo {
+	files, _ := ioutil.ReadDir(app.RootFolder())
+	var folders []os.FileInfo
+	for _, file := range files {
+		if file.IsDir() {
+			folders = append(folders, file)
+		}
+	}
+	return folders
+}
+
+func (app *HtmlApplication) NewWatcher(quitChan chan bool) {
+	var err error
+
+	app.watcher, err = fsnotify.NewWatcher()
+	if err != nil {
+		return
+	}
+	err = app.watcher.Watch(app.RootFolder())
+	if err != nil {
+		log.Fatal(err)
+	}
+	for _, folder := range app.RecursiveFolders() {
+		fullPath := app.RootFolder() + "/" + folder.Name()
+		app.watcher.Watch(fullPath)
+	}
+
+	go func() {
+	out:
+		for {
+			select {
+			case <-quitChan:
+				app.watcher.Close()
+				break out
+			case <-app.watcher.Event:
+				//ethutil.Config.Log.Debugln("Got event:", ev)
+				app.webView.Call("reload")
+			case err := <-app.watcher.Error:
+				// TODO: Do something here
+				ethutil.Config.Log.Infoln("Watcher error:", err)
+			}
+		}
+	}()
+
+}
+
 func (app *HtmlApplication) Engine() *qml.Engine {
 	return app.engine
 }
diff --git a/ethereum/config.go b/ethereum/config.go
index 7ca1a9801f..97e8687d8d 100644
--- a/ethereum/config.go
+++ b/ethereum/config.go
@@ -4,7 +4,6 @@ import (
 	"flag"
 )
 
-var StartConsole bool
 var StartMining bool
 var StartRpc bool
 var RpcPort int
@@ -20,12 +19,12 @@ var ExportKey bool
 var LogFile string
 var DataDir string
 var NonInteractive bool
+var StartJsConsole bool
+var InputFile string
 
 func Init() {
-	flag.BoolVar(&StartConsole, "c", false, "debug and testing console")
 	flag.BoolVar(&StartMining, "m", false, "start dagger mining")
 	flag.BoolVar(&ShowGenesis, "g", false, "prints genesis header and exits")
-	//flag.BoolVar(&UseGui, "gui", true, "use the gui")
 	flag.BoolVar(&StartRpc, "r", false, "start rpc server")
 	flag.IntVar(&RpcPort, "rpcport", 8080, "port to start json-rpc server on")
 	flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)")
@@ -37,7 +36,9 @@ func Init() {
 	flag.StringVar(&LogFile, "logfile", "", "log file (defaults to standard output)")
 	flag.StringVar(&DataDir, "dir", ".ethereum", "ethereum data directory")
 	flag.StringVar(&ImportKey, "import", "", "imports the given private key (hex)")
-	flag.IntVar(&MaxPeer, "x", 5, "maximum desired peers")
+	flag.IntVar(&MaxPeer, "x", 10, "maximum desired peers")
+	flag.BoolVar(&StartJsConsole, "js", false, "exp")
+	flag.StringVar(&InputFile, "e", "", "Run javascript file")
 
 	flag.Parse()
 }
diff --git a/ethereum/dev_console.go b/ethereum/dev_console.go
deleted file mode 100644
index 5941c03abe..0000000000
--- a/ethereum/dev_console.go
+++ /dev/null
@@ -1,259 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"bytes"
-	"encoding/hex"
-	"errors"
-	"fmt"
-	"github.com/ethereum/eth-go"
-	"github.com/ethereum/eth-go/ethchain"
-	"github.com/ethereum/eth-go/ethdb"
-	"github.com/ethereum/eth-go/ethutil"
-	"github.com/ethereum/eth-go/ethwire"
-	"github.com/ethereum/go-ethereum/utils"
-	"github.com/obscuren/mutan"
-	"os"
-	"strings"
-)
-
-type Console struct {
-	db       *ethdb.MemDatabase
-	trie     *ethutil.Trie
-	ethereum *eth.Ethereum
-}
-
-func NewConsole(s *eth.Ethereum) *Console {
-	db, _ := ethdb.NewMemDatabase()
-	trie := ethutil.NewTrie(db, "")
-
-	return &Console{db: db, trie: trie, ethereum: s}
-}
-
-func (i *Console) ValidateInput(action string, argumentLength int) error {
-	err := false
-	var expArgCount int
-
-	switch {
-	case action == "update" && argumentLength != 2:
-		err = true
-		expArgCount = 2
-	case action == "get" && argumentLength != 1:
-		err = true
-		expArgCount = 1
-	case action == "dag" && argumentLength != 2:
-		err = true
-		expArgCount = 2
-	case action == "decode" && argumentLength != 1:
-		err = true
-		expArgCount = 1
-	case action == "encode" && argumentLength != 1:
-		err = true
-		expArgCount = 1
-	case action == "gettx" && argumentLength != 1:
-		err = true
-		expArgCount = 1
-	case action == "tx" && argumentLength != 4:
-		err = true
-		expArgCount = 4
-	case action == "getaddr" && argumentLength != 1:
-		err = true
-		expArgCount = 1
-	case action == "contract" && argumentLength != 2:
-		err = true
-		expArgCount = 2
-	case action == "say" && argumentLength != 1:
-		err = true
-		expArgCount = 1
-	case action == "addp" && argumentLength != 1:
-		err = true
-		expArgCount = 1
-	case action == "block" && argumentLength != 1:
-		err = true
-		expArgCount = 1
-	}
-
-	if err {
-		return errors.New(fmt.Sprintf("'%s' requires %d args, got %d", action, expArgCount, argumentLength))
-	} else {
-		return nil
-	}
-}
-
-func (i *Console) Editor() string {
-	var buff bytes.Buffer
-	for {
-		reader := bufio.NewReader(os.Stdin)
-		str, _, err := reader.ReadLine()
-		if len(str) > 0 {
-			buff.Write(str)
-			buff.WriteString("\n")
-		}
-
-		if err != nil && err.Error() == "EOF" {
-			break
-		}
-	}
-
-	return buff.String()
-}
-
-func (i *Console) PrintRoot() {
-	root := ethutil.NewValue(i.trie.Root)
-	if len(root.Bytes()) != 0 {
-		fmt.Println(hex.EncodeToString(root.Bytes()))
-	} else {
-		fmt.Println(i.trie.Root)
-	}
-}
-
-func (i *Console) ParseInput(input string) bool {
-	scanner := bufio.NewScanner(strings.NewReader(input))
-	scanner.Split(bufio.ScanWords)
-
-	count := 0
-	var tokens []string
-	for scanner.Scan() {
-		count++
-		tokens = append(tokens, scanner.Text())
-	}
-	if err := scanner.Err(); err != nil {
-		fmt.Fprintln(os.Stderr, "reading input:", err)
-	}
-
-	if len(tokens) == 0 {
-		return true
-	}
-
-	err := i.ValidateInput(tokens[0], count-1)
-	if err != nil {
-		fmt.Println(err)
-	} else {
-		switch tokens[0] {
-		case "update":
-			i.trie.Update(tokens[1], tokens[2])
-
-			i.PrintRoot()
-		case "get":
-			fmt.Println(i.trie.Get(tokens[1]))
-		case "root":
-			i.PrintRoot()
-		case "rawroot":
-			fmt.Println(i.trie.Root)
-		case "print":
-			i.db.Print()
-		case "dag":
-			fmt.Println(ethchain.DaggerVerify(ethutil.Big(tokens[1]), // hash
-				ethutil.BigPow(2, 36),   // diff
-				ethutil.Big(tokens[2]))) // nonce
-		case "decode":
-			value := ethutil.NewValueFromBytes([]byte(tokens[1]))
-			fmt.Println(value)
-		case "getaddr":
-			encoded, _ := hex.DecodeString(tokens[1])
-			addr := i.ethereum.BlockChain().CurrentBlock.State().GetAccount(encoded)
-			fmt.Println("addr:", addr)
-		case "block":
-			encoded, _ := hex.DecodeString(tokens[1])
-			block := i.ethereum.BlockChain().GetBlock(encoded)
-			info := block.BlockInfo()
-			fmt.Printf("++++++++++ #%d ++++++++++\n%v\n", info.Number, block)
-		case "say":
-			i.ethereum.Broadcast(ethwire.MsgTalkTy, []interface{}{tokens[1]})
-		case "addp":
-			i.ethereum.ConnectToPeer(tokens[1])
-		case "pcount":
-			fmt.Println("peers:", i.ethereum.Peers().Len())
-		case "encode":
-			fmt.Printf("%q\n", ethutil.Encode(tokens[1]))
-		case "tx":
-			recipient, err := hex.DecodeString(tokens[1])
-			if err != nil {
-				fmt.Println("recipient err:", err)
-			} else {
-				tx := ethchain.NewTransactionMessage(recipient, ethutil.Big(tokens[2]), ethutil.Big(tokens[3]), ethutil.Big(tokens[4]), nil)
-
-				keyPair := ethutil.GetKeyRing().Get(0)
-				tx.Sign(keyPair.PrivateKey)
-				i.ethereum.TxPool().QueueTransaction(tx)
-
-				fmt.Printf("%x\n", tx.Hash())
-			}
-		case "gettx":
-			addr, _ := hex.DecodeString(tokens[1])
-			data, _ := ethutil.Config.Db.Get(addr)
-			if len(data) != 0 {
-				decoder := ethutil.NewValueFromBytes(data)
-				fmt.Println(decoder)
-			} else {
-				fmt.Println("gettx: tx not found")
-			}
-		case "contract":
-			fmt.Println("Contract editor (Ctrl-D = done)")
-
-			mainInput, initInput := mutan.PreParse(i.Editor())
-			mainScript, err := utils.Compile(mainInput)
-			if err != nil {
-				fmt.Println(err)
-
-				break
-			}
-			initScript, err := utils.Compile(initInput)
-			if err != nil {
-				fmt.Println(err)
-
-				break
-			}
-
-			contract := ethchain.NewContractCreationTx(ethutil.Big(tokens[0]), ethutil.Big(tokens[1]), ethutil.Big(tokens[1]), mainScript, initScript)
-
-			keyPair := ethutil.GetKeyRing().Get(0)
-			contract.Sign(keyPair.PrivateKey)
-
-			i.ethereum.TxPool().QueueTransaction(contract)
-
-			fmt.Printf("%x\n", contract.Hash()[12:])
-		case "exit", "quit", "q":
-			return false
-		case "help":
-			fmt.Printf("COMMANDS:\n" +
-				"\033[1m= DB =\033[0m\n" +
-				"update KEY VALUE - Updates/Creates a new value for the given key\n" +
-				"get KEY - Retrieves the given key\n" +
-				"root - Prints the hex encoded merkle root\n" +
-				"rawroot - Prints the raw merkle root\n" +
-				"block HASH - Prints the block\n" +
-				"getaddr ADDR - Prints the account associated with the address\n" +
-				"\033[1m= Dagger =\033[0m\n" +
-				"dag HASH NONCE - Verifies a nonce with the given hash with dagger\n" +
-				"\033[1m= Encoding =\033[0m\n" +
-				"decode STR\n" +
-				"encode STR\n" +
-				"\033[1m= Other =\033[0m\n" +
-				"addp HOST:PORT\n" +
-				"tx TO AMOUNT\n" +
-				"contract AMOUNT\n")
-
-		default:
-			fmt.Println("Unknown command:", tokens[0])
-		}
-	}
-
-	return true
-}
-
-func (i *Console) Start() {
-	fmt.Printf("Eth Console. Type (help) for help\n")
-	reader := bufio.NewReader(os.Stdin)
-	for {
-		fmt.Printf("eth >>> ")
-		str, _, err := reader.ReadLine()
-		if err != nil {
-			fmt.Println("Error reading input", err)
-		} else {
-			if !i.ParseInput(string(str)) {
-				return
-			}
-		}
-	}
-}
diff --git a/ethereum/ethereum.go b/ethereum/ethereum.go
index 2abf6da42a..2fdfd5caf1 100644
--- a/ethereum/ethereum.go
+++ b/ethereum/ethereum.go
@@ -6,6 +6,7 @@ import (
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/go-ethereum/utils"
+	"io/ioutil"
 	"log"
 	"os"
 	"os/signal"
@@ -15,16 +16,15 @@ import (
 
 const Debug = true
 
-// Register interrupt handlers so we can stop the ethereum
-func RegisterInterrupts(s *eth.Ethereum) {
-	// Buffered chan of one is enough
-	c := make(chan os.Signal, 1)
-	// Notify about interrupts for now
-	signal.Notify(c, os.Interrupt)
+func RegisterInterrupt(cb func(os.Signal)) {
 	go func() {
+		// Buffered chan of one is enough
+		c := make(chan os.Signal, 1)
+		// Notify about interrupts for now
+		signal.Notify(c, os.Interrupt)
+
 		for sig := range c {
-			fmt.Printf("Shutting down (%v) ... \n", sig)
-			s.Stop()
+			cb(sig)
 		}
 	}()
 }
@@ -52,7 +52,12 @@ func main() {
 	var logSys *log.Logger
 	flags := log.LstdFlags
 
-	ethutil.ReadConfig(DataDir)
+	if StartJsConsole || len(InputFile) > 0 {
+		ethutil.ReadConfig(DataDir, ethutil.LogFile)
+	} else {
+		ethutil.ReadConfig(DataDir, ethutil.LogFile|ethutil.LogStd)
+	}
+
 	logger := ethutil.Config.Log
 
 	if LogFile != "" {
@@ -136,21 +141,40 @@ save these words so you can restore your account later: %s
 		utils.DoMining(ethereum)
 	}
 
-	if StartConsole {
-		err := os.Mkdir(ethutil.Config.ExecPath, os.ModePerm)
-		// Error is OK if the error is ErrExist
-		if err != nil && !os.IsExist(err) {
-			log.Panic("Unable to create EXECPATH:", err)
+	if StartJsConsole {
+		repl := NewJSRepl(ethereum)
+
+		go repl.Start()
+
+		RegisterInterrupt(func(os.Signal) {
+			repl.Stop()
+		})
+	} else if len(InputFile) > 0 {
+		file, err := os.Open(InputFile)
+		if err != nil {
+			ethutil.Config.Log.Fatal(err)
 		}
 
-		console := NewConsole(ethereum)
-		go console.Start()
+		content, err := ioutil.ReadAll(file)
+		if err != nil {
+			ethutil.Config.Log.Fatal(err)
+		}
+
+		re := NewJSRE(ethereum)
+		RegisterInterrupt(func(os.Signal) {
+			re.Stop()
+		})
+		re.Run(string(content))
 	}
+
 	if StartRpc {
 		utils.DoRpc(ethereum, RpcPort)
 	}
 
-	RegisterInterrupts(ethereum)
+	RegisterInterrupt(func(sig os.Signal) {
+		fmt.Printf("Shutting down (%v) ... \n", sig)
+		ethereum.Stop()
+	})
 
 	ethereum.Start(UseSeed)
 
diff --git a/ethereum/javascript_runtime.go b/ethereum/javascript_runtime.go
new file mode 100644
index 0000000000..b06fb94603
--- /dev/null
+++ b/ethereum/javascript_runtime.go
@@ -0,0 +1,114 @@
+package main
+
+import (
+	"fmt"
+	"github.com/ethereum/eth-go"
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethpub"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/robertkrimen/otto"
+)
+
+type JSRE struct {
+	ethereum *eth.Ethereum
+	vm       *otto.Otto
+	lib      *ethpub.PEthereum
+
+	blockChan  chan ethutil.React
+	changeChan chan ethutil.React
+	quitChan   chan bool
+
+	objectCb map[string][]otto.Value
+}
+
+func NewJSRE(ethereum *eth.Ethereum) *JSRE {
+	re := &JSRE{
+		ethereum,
+		otto.New(),
+		ethpub.NewPEthereum(ethereum),
+		make(chan ethutil.React, 1),
+		make(chan ethutil.React, 1),
+		make(chan bool),
+		make(map[string][]otto.Value),
+	}
+
+	// Init the JS lib
+	re.vm.Run(jsLib)
+
+	// We have to make sure that, whoever calls this, calls "Stop"
+	go re.mainLoop()
+
+	re.Bind("eth", &JSEthereum{re.lib, re.vm})
+
+	re.initStdFuncs()
+
+	return re
+}
+
+func (self *JSRE) Bind(name string, v interface{}) {
+	self.vm.Set(name, v)
+}
+
+func (self *JSRE) Run(code string) (otto.Value, error) {
+	return self.vm.Run(code)
+}
+
+func (self *JSRE) Stop() {
+	// Kill the main loop
+	self.quitChan <- true
+
+	close(self.blockChan)
+	close(self.quitChan)
+	close(self.changeChan)
+}
+
+func (self *JSRE) mainLoop() {
+	// Subscribe to events
+	reactor := self.ethereum.Reactor()
+	reactor.Subscribe("newBlock", self.blockChan)
+
+out:
+	for {
+		select {
+		case <-self.quitChan:
+			break out
+		case block := <-self.blockChan:
+			if _, ok := block.Resource.(*ethchain.Block); ok {
+			}
+		case object := <-self.changeChan:
+			if stateObject, ok := object.Resource.(*ethchain.StateObject); ok {
+				for _, cb := range self.objectCb[ethutil.Hex(stateObject.Address())] {
+					val, _ := self.vm.ToValue(ethpub.NewPStateObject(stateObject))
+					cb.Call(cb, val)
+				}
+			} else if storageObject, ok := object.Resource.(*ethchain.StorageState); ok {
+				fmt.Println(storageObject)
+			}
+		}
+	}
+}
+
+func (self *JSRE) initStdFuncs() {
+	t, _ := self.vm.Get("eth")
+	eth := t.Object()
+	eth.Set("watch", func(call otto.FunctionCall) otto.Value {
+		addr, _ := call.Argument(0).ToString()
+		cb := call.Argument(1)
+
+		self.objectCb[addr] = append(self.objectCb[addr], cb)
+
+		event := "object:" + string(ethutil.FromHex(addr))
+		self.ethereum.Reactor().Subscribe(event, self.changeChan)
+
+		return otto.UndefinedValue()
+	})
+	eth.Set("addPeer", func(call otto.FunctionCall) otto.Value {
+		host, err := call.Argument(0).ToString()
+		if err != nil {
+			return otto.FalseValue()
+		}
+		self.ethereum.ConnectToPeer(host)
+
+		return otto.TrueValue()
+	})
+}
diff --git a/ethereum/js_lib.go b/ethereum/js_lib.go
new file mode 100644
index 0000000000..189dcc3a0b
--- /dev/null
+++ b/ethereum/js_lib.go
@@ -0,0 +1,53 @@
+package main
+
+const jsLib = `
+function pp(object) {
+    var str = "";
+
+    if(object instanceof Array) {
+        str += "[ ";
+        for(var i = 0, l = object.length; i < l; i++) {
+            str += pp(object[i]);
+
+            if(i < l-1) {
+                str += ", ";
+            }
+        }
+        str += " ]";
+    } else if(typeof(object) === "object") {
+        str += "{ ";
+        var last = Object.keys(object).sort().pop()
+        for(var k in object) {
+            str += k + ": " + pp(object[k]);
+
+            if(k !== last) {
+                str += ", ";
+            }
+        }
+        str += " }";
+    } else if(typeof(object) === "string") {
+        str += "\033[32m'" + object + "'";
+    } else if(typeof(object) === "undefined") {
+        str += "\033[1m\033[30m" + object;
+    } else if(typeof(object) === "number") {
+        str += "\033[31m" + object;
+    } else if(typeof(object) === "function") {
+	str += "\033[35m[Function]";
+    } else {
+        str += object;                    
+    }
+
+    str += "\033[0m";
+
+    return str;
+}
+
+function prettyPrint(/* */) {
+    var args = arguments;
+    for(var i = 0, l = args.length; i < l; i++) {
+	    console.log(pp(args[i]))
+    }
+}
+
+var print = prettyPrint;
+`
diff --git a/ethereum/repl.go b/ethereum/repl.go
new file mode 100644
index 0000000000..c0b63c0a51
--- /dev/null
+++ b/ethereum/repl.go
@@ -0,0 +1,97 @@
+package main
+
+import (
+	"fmt"
+	"github.com/ethereum/eth-go"
+	"github.com/ethereum/eth-go/ethpub"
+	"github.com/robertkrimen/otto"
+)
+
+type Repl interface {
+	Start()
+	Stop()
+}
+
+type JSRepl struct {
+	re *JSRE
+
+	prompt string
+}
+
+func NewJSRepl(ethereum *eth.Ethereum) *JSRepl {
+	return &JSRepl{re: NewJSRE(ethereum), prompt: "> "}
+}
+
+func (self *JSRepl) Start() {
+	self.read()
+}
+
+func (self *JSRepl) Stop() {
+	self.re.Stop()
+}
+
+func (self *JSRepl) parseInput(code string) {
+	defer func() {
+		if r := recover(); r != nil {
+			fmt.Println("[native] error", r)
+		}
+	}()
+
+	value, err := self.re.Run(code)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	self.PrintValue(value)
+}
+
+// The JSEthereum object attempts to wrap the PEthereum object and returns
+// meaningful javascript objects
+type JSEthereum struct {
+	*ethpub.PEthereum
+	vm *otto.Otto
+}
+
+func (self *JSEthereum) GetKey() otto.Value {
+	return self.toVal(self.PEthereum.GetKey())
+}
+
+func (self *JSEthereum) GetStateObject(addr string) otto.Value {
+	return self.toVal(self.PEthereum.GetStateObject(addr))
+}
+
+func (self *JSEthereum) Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr string) otto.Value {
+	r, err := self.PEthereum.Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr)
+	if err != nil {
+		fmt.Println(err)
+
+		return otto.UndefinedValue()
+	}
+
+	return self.toVal(r)
+}
+
+func (self *JSEthereum) Create(key, valueStr, gasStr, gasPriceStr, initStr, bodyStr string) otto.Value {
+	r, err := self.PEthereum.Create(key, valueStr, gasStr, gasPriceStr, initStr, bodyStr)
+
+	if err != nil {
+		fmt.Println(err)
+
+		return otto.UndefinedValue()
+	}
+
+	return self.toVal(r)
+}
+
+func (self *JSEthereum) toVal(v interface{}) otto.Value {
+	result, err := self.vm.ToValue(v)
+
+	if err != nil {
+		fmt.Println(err)
+
+		return otto.UndefinedValue()
+	}
+
+	return result
+}
diff --git a/ethereum/repl_darwin.go b/ethereum/repl_darwin.go
new file mode 100644
index 0000000000..87da3df1d8
--- /dev/null
+++ b/ethereum/repl_darwin.go
@@ -0,0 +1,93 @@
+package main
+
+// #cgo LDFLAGS: -lreadline
+// #include <stdio.h>
+// #include <stdlib.h>
+// #include <readline/readline.h>
+// #include <readline/history.h>
+import "C"
+
+import (
+	"github.com/robertkrimen/otto"
+	"strings"
+	"unsafe"
+)
+
+func readLine(prompt *string) *string {
+	var p *C.char
+
+	//readline allows an empty prompt(NULL)
+	if prompt != nil {
+		p = C.CString(*prompt)
+	}
+
+	ret := C.readline(p)
+
+	if p != nil {
+		C.free(unsafe.Pointer(p))
+	}
+
+	if ret == nil {
+		return nil
+	} //EOF
+
+	s := C.GoString(ret)
+	C.free(unsafe.Pointer(ret))
+	return &s
+}
+
+func addHistory(s string) {
+	p := C.CString(s)
+	C.add_history(p)
+	C.free(unsafe.Pointer(p))
+}
+
+var indentCount = 0
+var str = ""
+
+func (self *JSRepl) setIndent() {
+	open := strings.Count(str, "{")
+	open += strings.Count(str, "(")
+	closed := strings.Count(str, "}")
+	closed += strings.Count(str, ")")
+	indentCount = open - closed
+	if indentCount <= 0 {
+		self.prompt = "> "
+	} else {
+		self.prompt = strings.Join(make([]string, indentCount*2), "..")
+		self.prompt += " "
+	}
+}
+
+func (self *JSRepl) read() {
+L:
+	for {
+		switch result := readLine(&self.prompt); true {
+		case result == nil:
+			break L
+
+		case *result != "":
+			str += *result + "\n"
+
+			self.setIndent()
+
+			if indentCount <= 0 {
+				if *result == "exit" {
+					self.Stop()
+					break L
+				}
+
+				addHistory(str) //allow user to recall this line
+
+				self.parseInput(str)
+
+				str = ""
+			}
+		}
+	}
+}
+
+func (self *JSRepl) PrintValue(value otto.Value) {
+	method, _ := self.re.vm.Get("prettyPrint")
+	method.Call(method, value)
+}
diff --git a/ethereum/repl_linux.go b/ethereum/repl_linux.go
new file mode 120000
index 0000000000..276f135d76
--- /dev/null
+++ b/ethereum/repl_linux.go
@@ -0,0 +1 @@
+repl_darwin.go
\ No newline at end of file
diff --git a/ethereum/repl_windows.go b/ethereum/repl_windows.go
new file mode 100644
index 0000000000..9d4787772f
--- /dev/null
+++ b/ethereum/repl_windows.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func (self *JSRepl) read() {
+	reader := bufio.NewReader(os.Stdin)
+	for {
+		fmt.Printf(self.prompt)
+		str, _, err := reader.ReadLine()
+		if err != nil {
+			fmt.Println("Error reading input", err)
+		} else {
+			self.parseInput(string(str))
+		}
+	}
+}
+
+func (self *JSRepl) PrintValue(value otto.Value) {
+	fmt.Println(value)
+}
diff --git a/utils/cmd.go b/utils/cmd.go
index 8395ac8fc0..f163575da7 100644
--- a/utils/cmd.go
+++ b/utils/cmd.go
@@ -6,7 +6,6 @@ import (
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethrpc"
 	"github.com/ethereum/eth-go/ethutil"
-	"log"
 	"time"
 )
 
@@ -14,7 +13,7 @@ func DoRpc(ethereum *eth.Ethereum, RpcPort int) {
 	var err error
 	ethereum.RpcServer, err = ethrpc.NewJsonRpcServer(ethpub.NewPEthereum(ethereum), RpcPort)
 	if err != nil {
-		log.Println("Could not start RPC interface:", err)
+		ethutil.Config.Log.Infoln("Could not start RPC interface:", err)
 	} else {
 		go ethereum.RpcServer.Start()
 	}
@@ -25,7 +24,7 @@ func DoMining(ethereum *eth.Ethereum) {
 	ethereum.Mining = true
 
 	if ethutil.GetKeyRing().Len() == 0 {
-		log.Println("No address found, can't start mining")
+		ethutil.Config.Log.Infoln("No address found, can't start mining")
 		return
 	}
 	keyPair := ethutil.GetKeyRing().Get(0)
@@ -35,10 +34,12 @@ func DoMining(ethereum *eth.Ethereum) {
 		// Give it some time to connect with peers
 		time.Sleep(3 * time.Second)
 
-		for ethereum.IsUpToDate() == false {
-			time.Sleep(5 * time.Second)
-		}
-		log.Println("Miner started")
+		/*
+			for ethereum.IsUpToDate() == false {
+				time.Sleep(5 * time.Second)
+			}
+		*/
+		ethutil.Config.Log.Infoln("Miner started")
 
 		miner := ethminer.NewDefaultMiner(addr, ethereum)
 		miner.Start()