Atlas ... :(
I did attend to all Atlas-related sessions. I was kind of disappointed, not because of its power, but because of its complexity.
They are basically building a new scripting language in XML and a set of OO libraries in JavaScript, so it's like a whole platform. I'm not Javascript expert, but the code required to achieve simple tasks was not trivial and usually it was a lot of code.
I hope that when the platform matures it gets easier to use, and that it gets good design time support in VS.