Microsoft recently announced a new version for BizTalk Server. It will be called BizTalk Server 2006 R3. Main aim of this version is to have parity with other related technologies and tools like .Net 3.5, VS 2008, SQL Server 2008 and WIN Server 2008.
For more details: http://blogs.msdn.com/biztalk_server_team_blog/archive/2008/04/23/biztalk-server-2006-r3-is-announced.aspx
