My co-worker Kevin Kennedy (surface/graphics/3D expert) and I recorded a podcast for .NET Rocks, which hit the streets a couple days ago. We talk about developing for the surface, loosely coupled WPF apps, everyday WPF life with VS 2008 and Blend, RECESS, and a few other topics.
There’s even an announcement about how/where you can get the Surface SDK bits, without buying a Surface table!