This question is a bit of a shot in the dark and Im not even sure it makes sense at all.
Still : Im quite used to the good ol' LAMP server design but tend to feel I could use some good push technology instead of the very inefficient repeated AJAX calls to pull new data, if any. Is there any way to achieve this without Java servlets (ie using Apache/PHP) ? Is HTML5 giving any hope for a step in that direction ?
I looked into Comet technology but it looks like it's just long-polling AJAX, which is just faking a push technology (I don't really know but it doesnt sound like an efficient way to do push... just a way that works).