To continue the theme, VPC 2k7 also shipped.  I'm running SQL SP2 within vpc 2k7 as I write this :)  Woo hoo!

http://www.microsoft.com/windows/downloads/virtualpc/default.mspx

Technical overview (XPS format)

http://download.microsoft.com/download/6/D/F/6DFC4E29-CB62-4401-A13B-043ADFA697E2/Virtual_PC_Technical_Overview_2007.xps

Download

http://www.microsoft.com/downloads/details.aspx?FamilyId=04D26402-3199-48A3-AFA2-2DC0B40A73B6&displaylang=en