Serving the socket.io javscript file to a client via node.js/express
===

I'm trying to get a sample client connection working with socket.io and express (specifically, this one: http://www.catonmat.net/blog/nodejs-modules-socketio/ with some pieces from the other examples at https://github.com/LearnBoost/socket.io/blob/master/examples/chat/app.js). 

I've gotten most of the pieces set up and working - the server runs, and I can hit / to get the index.jade file to the browser. However, once that happens, it does nothing. 

Server:

    var io = require('socket.io');
    var express = require('express')
    , stylus = require('stylus')
    , nib = require('nib');
    
    var app = express.createServer()
    var io = io.listen(app);
    
    app.configure(function () {
      app.use(stylus.middleware({ src: __dirname + '/public', compile: compile }));
      app.use(express.static(__dirname + '/public'));
      app.set('views', __dirname);
      app.set('view engine', 'jade');
    
      function compile (str, path) {
        return stylus(str)
          .set('filename', path)
          .use(nib());
      };
    });
    
    app.get('/', function (req, res) {
      res.render('index', { layout: false });
    });
    
    
    app.listen(8080);
    
    io.sockets.on('connection', function (socket) {
      console.log('A socket connected!');
      socket.emit('news', { hello: 'world' });
      socket.on('my other event', function (data) {
        console.log(data);
      });
      socket.on('disconnect', function () {
        console.log('user disconnected');
      });
    });

index.jade:

    doctype 5
    html
      head
        link(href='/stylesheets/style.css', rel='stylesheet')
        script(src='http://code.jquery.com/jquery-1.6.1.min.js')
        script(src='/socket.io/socket.io.js')
        script
          // socket.io specific code
          var socket = io.connect('http://localhost:8080');
          socket.on('connect', function () {
            alert('connected');
          });
          socket.on('news', function (data) {
              console.log(data);
              socket.emit('my other event', { my: 'data' });
            });
      body
        #chat

It appears that the server isn't serving /socket.io/socket.io.js (http://localhost:8080/socket.io/socket.io.js yields an error). What do I need to do to get express to serve that file? I can't find that in any of the examples.

Is there anything else I'm doing wrong here?