Microsoft released the final version of ASP.NET AJAX 1.0 today. For a full announcement covering this release (with included links to the ASP.NET AJAX download page and upgrade whitepapers), visit this link on the Telerik Watch blog:
http://telerikwatch.com/2007/01/aspnet-ajax-10-released.html
http://telerikwatch.com/2007/01/aspnet-ajax-10-released.html