www.asp.net sites Video and Webcasts page has added to new vidoes for  Get Started with “Atlas”  and Get Started with the “Atlas” Control Toolkit? 

Get Started with “Atlas”? 
Take your first steps toward learning Microsoft “Atlas”, from downloading and installing the framework to creating your first AJAX-style application.
Duration: 10 minutes, 2 seconds
Watch the Video

Get Started with the “Atlas” Control Toolkit?
Learn how to extend your “Atlas” applications using the “Atlas” Control Toolkit. This video starts with the very basics, including downloading and installing the toolkit, and adding a few of its controls to a simple “Atlas”-enabled web page
Duration: 12 minutes, 9 seconds
Watch the Video

You can get all other vidoes on http://www.asp.net @ http://asp.net/learn/videos/default.aspx?tabid=63