Symfony has Ajax helpers that make programming an elaborate interface a piece of cake. This tutorial will show you step-by-step how to create an Ajax-powered symfony application in minutes.
This PHP framework presents a nice screencast demonstrating how easy it is to create an ajaxified web application. This is very very similar to the Ruby on Rails demonstration application, which is really cool, to see people boil it down to a demo-able screen capture movie.
Ajax Blog: 
