http://blogs.msdn.com/b/jgalasyn/archive/2006/12/20/visual-studio-2005-service-pack-1-is-posted.aspxFrom the blurb: New processor support (e.g., Core Duo) for code generation and profiling Performance and scale improvements in Team Foundation Server Team Foundation Server integration with Excel 2007 and Project 2007 Tool support for occasionally connecteden-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)