If you’re heavily using the AJAX helpers in Ruby on Rails like I am, you may want to check out Thomas Fuchs’ awesome presentation from Canada on Rails 2006.

You may find a few little tasty morsels that aren’t adequately (at all?) documented.

My favorite? Call your own. Although… respond_to is a close runner up, though I’ve been aware of it for a whie now.

BTW- If you are still building new sites/application in PHP, can I just ask… WTF?