NodeJS: Adding channels to a Socket.IO server without restarting

Edit: This question was asked due to inadequate knowledge of the EventMachine.

With the Socket.IO interface, I can multiplex connections with "channels". How would I start a Socket.IO server, but add channels without having to stop/start the server?

var io = require('socket.io').listen(80);

var chat = io
  .of('/chat')
  .on('connection', function (socket) {
    socket.emit('a message', {
        that: 'only'
      , '/chat': 'will get'
    });
    chat.emit('a message', {
        everyone: 'in'
      , '/chat': 'will get'
    });
  });

var news = io
  .of('/news')
  .on('connection', function (socket) {
    socket.emit('item', { news: 'item' });
  });

This code example from Socket.IO shows starting the server, then creating two channels called chat and news. What I if I started the server with chat, but wanted to add news without any interruption to chat? How would I add the channel?