Sun Java Studio Creator 2.0 has more AJAX components available:
They’re basically the productized (tool-enabled) version of this:
Oh, and if you’ve been in a cave for the past 6 months, Creator is now Free!
Update: Ed Burn has posted a series of screencasts of the AJAX Blueprints components. This seems to confirm Sun’s commitment to the Ajax Dojo Toolkit, but also mentions Shale Remoting and explicit use of the JSF PhaseListener which provides a good integration tehnology for AJAX into JSF. Some components require JSF 1.2 (GlassFish can run them for instance).