Microsoft recently annouced BizTalk Server 2009 R2, BizTalk's future and Roadmap:
Learn how BizTalk Server 2009 lets you focus on writing the code to do the hardcore business logic and let BizTalk take care of moving the data. Hear how your development skills with Windows Communication Foundation (WCF), and Windows Workflow Foundation (WF) work seamlessly with the powerful integration platform of BizTalk. Find out how BizTalk aligns with the Microsoft application server in the longer term.
http://microsoftpdc.com/Sessions/SVR15
BizTalk Server Roadmap:
Sources:
http://www.microsoft.com/biztalk/en/us/roadmap.aspx
http://microsoftpdc.com/Sessions/SVR15