Sorry for the late posting, but here are the links mentioned in the WCF geekSpeak with Justin Smith.
Justin's WCF book (available Jan, 2007) - one of the best WCF books on internals: http://www.microsoft.com/MSPress/books/9610.aspx
WCF and POX/REST with Clemens Vasters: http://friends.newtelligence.net/clemensv/PermaLink,guid,2d61b97b-3a6e-46bd-89db-b1b20499ba18.aspx
Blogs worth reading on WCF
Kenny Wolf: http://www.kennyw.com
Nicholas Allen: http://blogs.msdn.com/drnick/