 <ol> <li><p>Yes it's better to use a dedicated server. <a href="http://www.stream-hub.com/" rel="nofollow noreferrer">StreamHub Comet Server</a> seems to be the most popular these days.</p></li> <li><p>For a tutorial on how to get started with comet read this: <a href="http://streamhub.blogspot.com/2009/07/getting-started-with-streamhub-and.html" rel="nofollow noreferrer">Getting Started with Comet and StreamHub</a>.</p></li> </ol> <p>If you get stuck there is a <a href="http://groups.google.co.uk/group/streamhub-comet-server-community" rel="nofollow noreferrer">Google Group</a> to seek help.</p>