BizTAlk Server 2006 R3 will now be called BizTalk Server 2009, What to expect in the 2009 release of BizTalk:

• Support for the latest Microsoft Platforms including Hyper-V Virtualization, Visual Studios 2008, .Net 3.5, SQL 2008, and Windows Server 2008.
• Enhancements to SOA and Web Services, B2B Integration, and Developer Productivity.
• Additional enhancements driven by customer feedback