If you haven't heard of .NET Rocks! (DNR) I highly recommend you check it out. DNR is an "Internet Audio Talk Show for .NET Developers" hosted by Carl Franklin and Richard Campbell. The latest episode of DNR is Michèle Leroux Bustamante on WCF.
Carl Franklin also runs dnrTV, which is a combination of interview and training video. I'd suggest checking out Brian Noyes on Windows Presentation Foundation and Juval Löwy on .NET 3.0.
Very good stuff!