VHD Resizer for Virtual Server or Virtual PC
Found this tool that is good for VHD / Virtual Hard drive / Virtual Machine resizing. I have been running SQL Server on a VM and the performace thus far is good. The December 2007 edition of SQL Server Magazine had some good articles about virtualizing SQL Server... said a deprication of performance of 25%. Thus far, for my test purposes, I see no major difference in performace from a standard windows server.