Last Thursday, I attended a free web seminar on AJAX and Domino. The presentation was 30 minutes long and drilled into a sample application using AJAX. I thought the presentation was excellent. This was easy to follow and gave me a clear understanding on how I could apply this technique. I went out to one of the examples the presenter recommended and got that example to work on a test server. I asked a question about the challenges of debugging this technique. I got the answer I expected. It can be tricky. He did mention the javascript debugging capability of Firefox which I've yet to try. I figured print statements would be the only way to go. I just checked to see if his example was posted and it's not yet. Anyway, this is a great starter example of AJAX and you should invest the 30 minutes if you have an interest in AJAX.
You can watch the replay here.