http://blogs.technet.com/cliveeastwood/archive/2008/04/16/operations-manager-2007-performance-and-scalability-whitepaper-update-april-2008.aspxThe Perf and Scale guide on http://www.microsoft.com/downloads/details.aspx?FamilyID=a1b7610d-3dbe-4e51-bcb3-446d50dadf14&DisplayLang=en has been updated to include Service Pack 1 data. Primary updates include: More prescriptive guidance on Gatewayen-USCommunityServer 2.1 SP1 (Build: 61025.2)