Windows® Server® 2008 R2 builds upon the exceptional legacy of Windows Server 2008.  R2 is an incremental release to Windows Server 2008 – and only the second time that Windows Client and Server releases are shipped simultaneously (Windows 2000 Server® was first).  While Windows 7 is available in both 32- and 64-bit versions, R2 is the first 64-bit only Server release.   Some of the key new features areas in Windows Server 2008 R2 include:

Developers will appreciate these extensible platform technologies.   Learn more about R2 for Developers at MSDN Channel9 and download the new Developer Training Kit.