On Monday Microsoft pulled the $28 price tag from the stand-alone version of Hyper-V Server 2008, and will now be making it available FREE!!! That's right F-R-E-E!!!
This will surely help with your deployment of virtualized systems.
Check out this NetworkWorld: Microsoft offers free Hyper-V stand-alone version article for details.
Software should be available for free in the next 30 days.