AJAX is the thing. All the cool kids are playing with it now. Implementing it from scratch can be an exercise in masochism, especially from a debugging perspective. Enter SAJAX a PHP library that makes AJAX applications accessible to the masses of web developers still using boring, synchronous, form-centric POST and GET. (I know what you’re thinking: how passe!)
In any case SAJAX (in the developers’ words) “makes it so simple to do this that your friends will make fun of you if you don’t.”
So. What are you waiting for? Go there. Use it or I’ll make fun of you.