http://blogs.technet.com/peterfi/archive/2007/06/21/microsoft-runs-over-a-1000-virtual-machines.aspxHere's a great article based on an interview with Devin Murray, Microsoft's Group Manager for Utility Services who run the servers in Microsoft's Datacenters. http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleId=9020679&pageNumber=1en-USCommunityServer 2.1 SP1 (Build: 61025.2)