SharePoint Server 2010 capacity management

• SharePoint Server 2010 capacity management: Software boundaries and limits
  http://technet.microsoft.com/en-us/library/cc262787.aspx
• SharePoint Server 2010 performance and capacity test results and recommendations
  http://www.microsoft.com/downloads/en/details.aspx?FamilyID=fd1eac86-ad47-4865-9378-80040d08ac55