We had a lot of fun at the Portland .NET Users group showing the information that's publicly available on Whidbey, Yukon, and Longhorn (with a little Indigo thrown in).

We've posted our slides.  Feel free to check them out. via [Sean 'Early' Campbell & Scott 'Adopter' Swigart's Radio Weblog]

Good stuff, but be warned that this contains both speculation and some stuff that, I think, represents outdated strategies.