Ulf B. Simon-Weidner's Blog
Daniel Melanchthon - a former MVP for Exchange Server, has recently joined Microsoft Germany as Evangelist (Technologieberater) for Exchange. He also started to blog - read it at http://blogs.msdn.com/dmelanchthon. Everytime I meet him we enjoy great conversations - it's always nice to geektalk. Yesterday we recognized that we have a somewhat similar background - we both started in the IT-Field during school, wrote programs to automate our job to have more time for more interesting projects, stopped studying to start working in IT fulltime in the consulting field, love communities and became MVPs. Daniel will be at many Microsoft Roadshows and Tradeshows in Germany (also the upcoming CeBit), so enjoy his talks when he's in your area.
Further the Windows Server Product Group has started their own blog as well, read it at http://blogs.msdn.com/windowsserver. Looking at the contributors I know I expect them to cover the upcoming x64-Versions of Windows in the close future.