All About Microsoft posted a story that BizTalk Server 2010 R2 is coming six months after Windows Server 8.
Via the BizTalk Server Team blog, Microsoft officials said on December 8 there will be a new release of the on-premises version of BizTalk Server coming, and that it will be delivered about six months after the release of Windows Server 8.Microsoft: Next BizTalk Server update due six months after Windows Server 8
(Yes, Microsoft still hasn’t said when Windows 8 — client or server — will be released, so this doesn’t pin things down a whole lot. But many company watchers think Windows 8 will be released to manufacturing in the summer/fall 2012 timeframe.)