doing a book. The whole problem with Jeff and I in this regard is that when we work together, we are too busy developing new things and rarely put pen to paper. In short we are too alike and enjoy the idea of creating new techniques as opposed to writing about existing techniques.
The interesting thing about working together in that manner was that we heavily were looking into using XML based techniques combined with existing HTML techniques. While we covered quite a bit of ground, the fact of the matter was that the only browser capable of using XML in any reasonable way was IE5+, so we tossed the idea out the window for the time being.
Recently Garret Smith of Adaptive Path made a good case for using Asynchronous JavaScript and XML and coined the acronym "AJAX" to represent that notion. It is similar to the