Can't connect and getting a "unhandled socket.io url" error with MAMP + Socket.io (node.js)

Running socket.io version 0.8.5, I finally got this working using the following code:

server.js

var sys = require('sys'),    express = require('express'),    app         = express.createServer('localhost'),    io          = require('socket.io'); app.use(express.static(__dirname + '/public'));app.get('/', function (req, res) {    res.send('Hello World');});app.listen(3000);var server = io.listen(app); server.sockets.on('connection', function (client){     // new client is here!    client.send ( 'Now connected!' );    client.on('message', function () {    }) ;    client.on('disconnect', function () {    });});

client script:

<script src="http://localhost:3000/socket.io/socket.io.js"></script><script src="/assets/js/jquery-1.6.4.min.js"></script><script type="text/javascript">     $(document).ready(function(){        var socket  = io.connect('http://localhost:3000'),        text = $('#text');        socket.on('connect', function () {            text.html('connected');            socket.on('message', function (msg) {                text.html(msg);            });        });        socket.on('disconnect', function () {            text.html('disconnected');        });    });</script> 

With everything up and running, upon going to my page, I see "Now connected!" almost immediately. I'm also serving my page up via CodeIgniter on MAMP - everything is working!