Hyper-V Program Manager
Check them out:
Video: Symmetric Multiprocessing with Windows Server virtualization (Hyper-V)
Video: Virtual networking with Windows Server 2008 with Hyper-V
Video: Virtual storage for Windows Server 2008 with Hyper-V
I wish some of that could get backported to VPC. Nothing fancy mind you, but it would be nice to have access to more than 3 vhds at once.
My personal data management/segmentation techniques require at least 4, so I have to currently make some compromises to get things done.