Atlas is a promising framework that Microsoft debuted with the April CTP. Atlas is a free standards-compliant framework for creating interactive and AJAX-like effects in your web applications. What I love is that Atlas works with all the familiar ways you're used to writing AJAX. It uses div tags and CSS styles very well. With all the unfettered AJAX craze going on, and so many libraries and methods spewed everywhere like the aftermath of a very serious Half-life 2 gamer, Atlas offers a sensible grown up platform that your parents warned you about. Atlas allows cross-browser AJAX enabled sites with almost no code. My wife had to pick my jaw up off the floor. Atlas is one of the dead-sexiest things I have seen in a long time, not to mention ASP.NET and 2.0 especially. I found myself wondering how Microsoft pulled this off, oh wait that's right they pushed Vista back AGAIN! Oh well, at least now I will be an ASP/Atlas wizard by the time Vista shows up. It's just good to have stuff to play with while I'm waiting.