I'm a big fan of the script.aculo.us javascript library. I have been using some of the effects on a dashboard console for one of my clients, it has been quite nice to work with, and has really helped improve the user experience.

I also used script.aculo.us on cssdocs.

Here's the AJAX prototype example that I used in my AJAX presentation today.

I wanted to give an example of a good use of AJAX, and at the same time keep it simple. So I thought a good example

would be to build a zip code verifier.

I've been learning Flex for a presentation at my local CFUG, and I'm actually quite impressed with how much you can do with so little code.