ASP.NET AJAX 1.0 Released
Finally ASP.NET AJAX 1.0, known as Atlas, is released in a fully supported version. The Download is available at http://ajax.asp.net.
Here's a summary from Scott's blog:
The ASP.NET AJAX 1.0, which is available for free with full Microsoft support, can be extended with the ASP.NET AJAX Control Toolkit - a set of more than 30 controls for ASP.NET.