Comet is a particular technique to interact asyncronously with the client.
Instead of perform a lot of calls using Ajax (polling) the server is able to send to client, whenever it wants, a generic response.
Unfortunately in the PHP world there's no simple way to implement this kind of technique and I'll write more posts to explain better how to implement this library and what is generally possible to do, or not possible yet, with Comet idea inside a dedicated PHP environment.
As last information, Phomet comes with all necessary to be optimized on client, and its final result is about 1.57Kb on client, and ridiculously 4.52 Kb on server, comments included :)
Here is the download, unpack them into your localhost, and go into phomet folder to view the first demo.
Compatibility? I've tested them with IE6, 7, 8, Opera 9, FireFox 1.5, 2, 3, Safari 3 windows but I am sure there are other browsers compatible.
I am waiting for your suggestions, bugs, opinions, whatever :D
Cheers, and please stay tuned for next Comet appointments :geek: