diff --git a/cmd/disasm/main.go b/cmd/disasm/main.go
new file mode 100644
index 000000000..c07246b00
--- /dev/null
+++ b/cmd/disasm/main.go
@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/ethereum/go-ethereum/vm"
+)
+
+func main() {
+	code, err := ioutil.ReadAll(os.Stdin)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	code = ethutil.Hex2Bytes(string(code[:len(code)-1]))
+	fmt.Printf("%x\n", code)
+
+	for pc := uint64(0); pc < uint64(len(code)); pc++ {
+		op := vm.OpCode(code[pc])
+		fmt.Printf("%-5d  %v", pc, op)
+
+		switch op {
+		case vm.PUSH1, vm.PUSH2, vm.PUSH3, vm.PUSH4, vm.PUSH5, vm.PUSH6, vm.PUSH7, vm.PUSH8, vm.PUSH9, vm.PUSH10, vm.PUSH11, vm.PUSH12, vm.PUSH13, vm.PUSH14, vm.PUSH15, vm.PUSH16, vm.PUSH17, vm.PUSH18, vm.PUSH19, vm.PUSH20, vm.PUSH21, vm.PUSH22, vm.PUSH23, vm.PUSH24, vm.PUSH25, vm.PUSH26, vm.PUSH27, vm.PUSH28, vm.PUSH29, vm.PUSH30, vm.PUSH31, vm.PUSH32:
+			a := uint64(op) - uint64(vm.PUSH1) + 1
+			fmt.Printf("  => %x", code[pc+1:pc+1+a])
+
+			pc += a
+		}
+		fmt.Println()
+	}
+}
diff --git a/cmd/mist/assets/examples/test.html b/cmd/mist/assets/examples/abi.html
similarity index 67%
rename from cmd/mist/assets/examples/test.html
rename to cmd/mist/assets/examples/abi.html
index cfc010971..8d172482c 100644
--- a/cmd/mist/assets/examples/test.html
+++ b/cmd/mist/assets/examples/abi.html
@@ -20,11 +20,10 @@
 		}]
 	}];
 	var address = web3.eth.transact({
-		data: "0x603880600c6000396000f3006001600060e060020a600035048063c6888fa114601857005b6021600435602b565b8060005260206000f35b6000816007029050",
+		data: "0x603880600c6000396000f3006001600060e060020a600035048063c6888fa114601857005b6021600435602b565b8060005260206000f35b600081600702905091905056",
 		gasprice: "1000000000000000",
 		gas: "10000",
 	});
-	console.log("created contract with addr:"+ address);
 	var contract = web3.eth.contract(address, desc);
 
 	function calculate() {
@@ -36,9 +35,21 @@
 </script>
 </head>
 <body>
+<h3>Contract content</h3>
+<textarea style="height:100px; width: 300px;" disabled="disabled">
+contract test {
+    function multiply(uint a) returns(uint d) {
+        return a * 7;
+    }
+}
+</textarea>
+<code><pre>
+603880600c6000396000f3006001600060e060020a600035048063c6888fa1140
+05b6021600435602b565b8060005260206000f35b600081600702905091905056</pre></code>
 
-<div><input type="number" id="value" onkeyup='calculate()'></input></div>
-<div id="result"></div>
+<hr>
+<div>7 x <input type="number" id="value" onkeyup='calculate()'></input> = 
+<span id="result"></spa>
 
 </body>
 </html>
diff --git a/cmd/mist/assets/examples/balance.html b/cmd/mist/assets/examples/balance.html
new file mode 100644
index 000000000..bc483a879
--- /dev/null
+++ b/cmd/mist/assets/examples/balance.html
@@ -0,0 +1,40 @@
+<!doctype>
+<html>
+
+<head>
+<script src="../ext/bignumber.min.js"></script>
+<script src="../ext/ethereum.js/dist/ethereum.js"></script>
+<script type="text/javascript">
+   
+    var web3 = require('web3');
+    web3.setProvider(new web3.providers.HttpSyncProvider('http://localhost:8080'));
+
+    function watchBalance() {
+        var coinbase = web3.eth.coinbase;
+        var originalBalance = 0;
+
+        var balance = web3.eth.balanceAt(coinbase);
+        var originalBalance = web3.toDecimal(balance);
+        document.getElementById('original').innerText = 'original balance: ' + originalBalance + '    watching...';
+
+        web3.eth.watch({altered: coinbase}).changed(function() {
+            balance = web3.eth.balanceAt(coinbase)
+            var currentBalance = web3.toDecimal(balance);
+            document.getElementById("current").innerText = 'current: ' + currentBalance;
+            document.getElementById("diff").innerText = 'diff:    ' + (currentBalance - originalBalance);
+        });
+    }
+
+</script>
+</head>
+<body>
+    <h1>coinbase balance</h1>
+    <button type="button" onClick="watchBalance();">watch balance</button>
+    <div></div>
+    <div id="original"></div>
+    <div id="current"></div>
+    <div id="diff"></div>
+</body>
+</html>
+
+
diff --git a/rpc/packages.go b/rpc/packages.go
index 4302f6018..b25660b25 100644
--- a/rpc/packages.go
+++ b/rpc/packages.go
@@ -35,6 +35,19 @@ import (
 	"github.com/ethereum/go-ethereum/xeth"
 )
 
+func toHex(b []byte) string {
+	return "0x" + ethutil.Bytes2Hex(b)
+}
+func fromHex(s string) []byte {
+	if len(s) > 1 {
+		if s[0:2] == "0x" {
+			s = s[2:]
+		}
+		return ethutil.Hex2Bytes(s)
+	}
+	return nil
+}
+
 type RpcServer interface {
 	Start()
 	Stop()
@@ -163,7 +176,7 @@ func (p *EthereumApi) GetCodeAt(args *GetCodeAtArgs, reply *interface{}) error {
 }
 
 func (p *EthereumApi) Sha3(args *Sha3Args, reply *interface{}) error {
-	*reply = ethutil.Bytes2Hex(crypto.Sha3(ethutil.Hex2Bytes(args.Data)))
+	*reply = toHex(crypto.Sha3(fromHex(args.Data)))
 	return nil
 }
 
