Microsoft Ajax Library RC is Available!
The ASP.NET team had finally released the RC of the AJAX Library (previously "Atlas") and you could get a copy of it at http://www.microsoft.com/downloads/details.aspx?FamilyId=8FA6E076-582B-440F-95CB-C40ED23FDF59&displaylang=en.
One major change in the RC is that the previously Microsoft.Web.* will be now part of System.Web.* and there'd be no major changes expected between now and RTM.
Happy Ajaxing. =)
Read the complete post at http://darrensim.com/blogs/techbits/archive/2006/12/15/microsoft-ajax-library-rc-is-available.aspx