Resources to get you started with Ajax
By Shay Shmeltzer-Oracle on May 05, 2006
The May edition of the Oracle Java newsletter just went out yesterday and it features some resource to get you started doing the AJAX thing.
Everything from a basic introduction to the concepts, through a practical step-by-step development, to integrating it with an ADF Faces based application.
So give it a read here.
And make sure to register to the newsletter if you are not already getting it.