Here are some videos demonstrating how to use the WCF support in BizTalk.
This Windows Communication Foundation (WCF) video demonstrates using the BizTalk WCF Service Publishing Wizard.
This Windows Communication Foundation (WCF) video demonstrates using the BizTalk WCF Service Consuming Wizard.
This Windows Communication Foundation (WCF) video examines how to configure a BizTalk receive location using the WCF-Custom adapter.