I\'ve read a little about comet and also APE.
Which one is better? I want the users to see other users updated content. Like Google Wave.
And in comet, there are
APE is an implementation of Comet. It provides a non-blocking IO server and JS client libraries to implement a publish/subscribe messaging system.
The APE server itself can be programmed using server-side javascript. Server side code such as PHP/Ruby/whatever may broadcast data through APE by issuing 'commands' to the APE server.
Connected clients receive this data by listening for 'Raws' ; which are events and data sent from the APE server to the client.