AJAX Again

There are a couple of interesting articles out on AJAX. One from Paul Graham and the other linked in from The Server Side. I must confess most of my experience is tying things together in the integration layer with various technologies. I can't profess to be an expert on web based gui applications. What interest me is the promise of a richer web based experience. Of course another interesting idea put forth for AJAX is the idea of orchestration of multiple web services from within the client app.