Robert Hess tells me the next episode of The .NET Show on MSDN will cover WinFS. He's interested in feedback on what topics you'd like to see covered.
What would you ask these guys about -- the philosophy behind WinFS? How they design the schemas, data model or API? Questions around performance or security? Architectural guidelines on how to best leverage WinFS in your apps? What you can do to prepare your apps today to use WinFS?