I think you have misunderstood something. Comet is a general way of pushing back events as they happen and there are different ways of implementing comet, two o

I think you have misunderstood something. Comet is a general way of pushing back events as they happen and there are different ways of implementing comet, two of these ways are using long poll and using WebSockets... Why you should care about comet? Because it is the future of web applications. Look at Google Wave, Facebook Chat or Google Documents - - they use comet to create realtime web applications. I predict that most web-applications will use this technology as most sites today use Ajax in some form. Also note the point of entry into building a scaleable comet application is getting much lower with such tools like node.js, erlycomet and JBoss Netty.