Can't say that I didn't see this coming. Especially after I got to see Lee at the Adobe AIR Bus Tour Event in Portland. I skipped his presentation at MIX for one of the many sessions on Silverlight. I've been following Lee's WPF blog for as long as it has been up (great resource, A++). He's also put together a series of WPF training videos at ContentPresenter.com. Congratulations and good luck, Lee, Traitor. 
Note: I actually typed this up on the 12th of September but never got around to posting it. I saved it off to finish later, but then got so busy with work and a trip to Boston that I never got around to it.