The MMS 2011 Hands-on-Labs are based on HP’s Reference Configuration for Hyper-V Private Cloud. Here is the story in pictures. There are 400 labs and the 1600 virtual machines required for those labs are provisioned in 10 minutes, six times a day. System Center is used to manage the private cloud which is based on Hyper-V Server 2008 R2 SP1, HP EVA storage and HP c-Class BladeSystem 2-socket G7 servers with FlexFabric.
The next picture I thank to Ronald Beekelaar, who heads the team creating the hands-on-labs and instructor-led labs. Ronald is also a Virtual Machine MVP. He said: “To provide a sense of scaling, a "Hyper-V Mosaic" Web page that displayed live-updating thumbnails of all the running lab VMs, was developed. That Web page was then streamed to the large information display at the entrance of the conference”
No, this is not a futuristic HP ProLiant model running on wine
Jeff Woolsey also wrote a blog explaining a bit more about the Private Cloud: