One of the goodies that PDC attendees will find in their swag bag is a poster called "Lighting up on Windows Vista". It lists the top 10 things developers can do to build apps that will run like a dream on our new OS release.
We've now posted a short whitepaper that adds some technical background and documenation to that poster. If you're looking for a good quick answer to the question "is there anything new or interesting in Windows Vista?", this is a pretty good place to start getting answers. We have lots of PDC sessions that drill deeper into these technologies as well, and as the week progresses we will be making the slides from those talks available.