New Atlas release with "go-live" license
You can get the new release and a lot of information directly from the Atlas web site.
There is even a contest you can participate in to win prizes if you build an application using Atlas.
"Atlas" is a set of technologies to add AJAX (Asynchronous JavaScript And XML) support to ASP.NET. It consists of a client-side script framework, server controls and more. Atlas is a free add-on to ASP.NET.