The new TechNet Script Center Gallery has a useful RSS feed of most active submitted scripts. This help me find two useful ones:
There’s also a bunch I’ve uploaded for Hyper-V/Hyper-V Server and VPC/VS:
And don’t forget jamesone’s excellent PowerShell management Library for Hyper-V. Also free, as-in-beer.
You will also want to look at the Windows Management Framework: PS 2.0, WinRM 2.0 and BITS 4.0.