I took this exam back in June during the beta period and received notification in the middle of the last night that I passed.
"Congratulations on earning your Microsoft Certified Technology Specialist: Windows Server 2008 Hyper-V, Configuration certification! We hope you enjoy the benefits of your certification and of membership in the Microsoft Certified Professional community."
Pretty cool, although I've been doing a lot of Hyper-V since the early beta builds in the TAP program and application streaming with Softgrid for a while, so this test was in line with a lot of activities I already do. Good to know that I passed because a few of the questions were pretty tricky.
You can read more about the exam
here and
here.