We just published our first MSDN article relating to the Pro WCF Book. It is currently being selected to headline Microsoft .Net 3.0 Development Centre homepage! This is a customized version of chapter 5 of the book of which I was the main author.
http://msdn2.microsoft.com/en-us/netframework/default.aspx
The article can be found in the MSDN library. The direct link:
http://msdn2.microsoft.com/en-us/library/bb332338.aspx