Books:
Programming WCF Services by Juval Lowy
Learning WCF by Michele Leroux Bustamante
Web sites:
IDesign.net - Juval Lowy's website
Michele Leroux Bustamante
Tutorial:
WCF Step-by-step tutorial
MSDN Getting started tutorial
WCF Hello World Tutorial
WCF Training Guide
WCF Simple Example in Visual Studio 2010
How to implement a contract callback using a oneway method in WCF
WCF Essentials
Beginner's Guide to Windows Communication Foundation
WCF Tutorial.net
WCF Guidance for WPF Developers
DIMECASTS.net