ASP.NET AJAX 4.0 CodePlex Preview 121 Jul 2008
The future of ASP.NET AJAX can be found in the Roadmap document hosted on the CodePlex website.
The preview 1 release contains somewhat complete versions of the following features
- Client-side template rendering
- Declarative instantiation of behaviors and controls
- DataView control
- Markup extensions
Feel free to download the preview yourself and kick the tires.