BizTalk and Windows Communication Foundation are complementary technologies. BizTalk provides business process orchestration, message transformation, business activity monitoring, and more through designers and visual tools. Windows Communication Foundation provides a unified framework for building secure and reliable transacted Web services. When Windows Communication Foundation ships, BizTalk will provide a Windows Communication Foundation adapter that enables Windows Communication Foundation services to be incorporated into business process orchestration. In future versions of BizTalk, the integration between the technologies will be even more seamless, with Windows Communication Foundation providing the core messaging and Web service capabilities of BizTalk. How does Windows Communication Foundation relate to Visual Studio 2005? Visual Studio 2005 is the next release of the .NET Framework and Visual Studio development tools. Windows Communication Foundation is a set of additional managed class libraries that provide a unified framework for building advanced Web services. Windows Communication Foundation extends the .NET Framework and is fully compatible with Visual Studio 2005, meaning that developers using Visual Studio 2005 will be able to program against the Windows Communication Foundation class libraries using the language of their choice, their existing skills, and a familiar environment.