Another CTP of atlas is coming really soon. It looks like they have added a ton of features. First they got rid of their lame ass XML script controls and replaced them with something that is more in line with the existing server controls today.
What is cool is that they created the concept of an updatable region. This tells the page that this part of the page can be updated. You simply use the new UpdatePanel control and put in regular ASP.NET server side controls (i.e.: GridView, or whatever).
Another cool thing is that the ability to do timed refreshes of a section. So that way you can have a part of the page update automatically without posting the entire page back. Say, goodbye to sites using meta refreshes.
I checked and this is not out yet, but it should be by the end of the week or early next week I believe.
You can read more about the new features from Nikhil.
Read the complete post at http://www.dotnettipoftheday.com/blog.aspx?id=226