Ajax in 30 seconds

I have ranted about Ajax in the past. Today i ran into this 30 second tutorial by Rasmus (of PHP fame) on how to do PHP and Ajax. It simple and down right to the point. Here's a link on Rasmus.

I found it in this article (State of Ajax) which has several other interesting links for my permanent book marks collection. Here are few, the rest you may pick up directly from the article:
These are just some. Do share yours with me..