I am here to answer questions. I will start by sharing some implementation details:<p>- we use long polling, but will add WebSocket support once we get more browsers that support it. The code to make it work is shared here: <a href="http://amix.dk/blog/post/19489" rel="nofollow">http://amix.dk/blog/post/19489</a><p>- we had a smaller comet system in the past that was based on Java + JBoss Netty. It didn't scale that well (used ~10x time the memory node.js solution and had a lot of quirks, like lost connections). Generally thought Netty worked "ok", but I would recommend anyone doing anything serious to look at node.js<p>- node.js feels VERY natural, but it could be because I had coded so much in JavaScript :)<p>- I have done a presentation on comet with node.js+V8 to the Taipei Open Source Group which you can check out here: <a href="http://amix.dk/blog/post/19484" rel="nofollow">http://amix.dk/blog/post/19484</a><p>The technology is there to build next generation web-applications, what are you waiting for? :)