New features include compatibility with Windows Vista and Office 2007, enhanced BI functionality and improvements to Integration, Analysis and Reporting Services.  Microsoft has worked closely with the community to develop quality updates for this service pack. For details, go to http://download.microsoft.com/download/2/b/5/2b5e5d37-9b17-423d-bc8f-b11ecd4195b4/WhatsNewSQL2005SP2.htm