Kam VedBrat, lead program manager of Expression Web —talks about how to take advantage of some of the new features, like Glass. Glass is a feature that has actually been a little mystery to devs, and Kam clears it all up with a simple demo. He also explaned on how composition works under the Desktop Window Manager.
Basically, even though Vista looks more or less like good old Windows, a lot has changed, and Kam has the inside story. He even clears up the answer to a question that's been troubling devs for a while now: What is Aero? We've all heard a lot about it, and in many different contexts. As a result, there's some confusion about what it really is. Is it an API? Is it a spec? Is it an experience?