A few days ago , Microsoft announced the forthcoming release of BizTalk Server 2010 R2 on the BizTalk Server blog site. This is advanced notice, given that this new version will ship six months after the release of Windows 8, expected in the second half of next year. On this basis, we can expect the new version of BizTalk Server to arrive in 2013. Given the BizTalk team’s previous record of name changes, I wonder if this will eventually be released as BizTalk Server 2013.
More Infor read this http://blogs.msdn.com/b/biztalk_server_team_blog/archive/2011/12/08/biztalk-server-2010-r2.aspx