http://blogs.technet.com/stefan_gossner/archive/2008/10/14/preliminary-guidance-for-using-sharepoint-products-and-technologies-with-hyper-v.aspxA couple of weeks ago a whitepaper containing a support statement for using MOSS 2007 and WSS 3.0 in Hyper V has been released: Using SharePoint Products and Technologies in a Hyper-V virtual environment Important Points covered in this paper: Supporten-USCommunityServer 2.1 SP1 (Build: 61025.2)