Microsoft has announced a partnership program to deliver Hyper-V based private cloud solutions called Hyper-V Cloud Fast Track Partners. It sounds like a marketing thing for buying a bundle of hardware and software to me. Nothing exclusive is included.
There is some documentation on how to build a private cloud (using Hyper-V, VMM and SCVMM SSP 2.0) available. You’ll find that to be a bit more of interest.