Service Pack 2 is an update to Windows Server 2008 and Windows Vista that incorporates improvements discovered through automated feedback, as well as updates that have been delivered since SP1. By providing these fixes integrated into a single service pack for both client and server, Microsoft provides a single high-quality update that minimizes deployment and testing complexity for customers.

Download: x86 | x64 | ia64-based Systems | DVD – Five Language Standalone (KB948465)

Update: Microsoft confirms that Windows Server 2008 Service Pack 2 will support Exchange 2007. This’ll be also true for the upcoming Exchange 2007 SP2.