Microsoft has released a new version of the AJAX Control Toolkit - Version 3.5.20820.

The 2008-08-20 release of the AJAX Control Toolkit targets the official release of .NET Framework 3.5 SP1 and Visual Studio 2008 SP1.

AjaxControlToolkit-Framework3.5SP1.zip is the full release package with complete source code to all controls, the test framework, VSI, and more.
AjaxControlToolkit-Framework3.5SP1-NoSource.zip contains only the sample web site and VSI and is for people who don't need or want the source code for the controls.

To start using the Toolkit in your own web sites, please follow the instructions on the Setup Walkthrough.

To start building your own extenders, launch the VSI installers on your machine. This will install new Visual Studio templates that contain everything you need to build extenders.

To get started with source code, simply load the "AjaxControlToolkit.sln" solution in Visual Studio 2005, and run the solution. This will launch the web site and allow you to experiment with the different controls. Also included in the solution is the source code for all the controls.

Please see the sample website release notes for more details.