Mark Russinovich is the founder of SysInternals the software company that was acquired by Microsoft recently. He's been made a Technical Fellow (the highest technical role at Microsoft) and is now working on the Kernel of Windows, so he knows his way around Windows Server 2008, Windows Vista and Windows 7 pretty well.
I just finished watching this great Channel 9 video recorded before Christmas where Mark delves into the guts of Server 2008, Virtualization featuring Hyper-V and Windows Vista. You can see the video yourself.
Mark Russinovich, Windows Server 2008, Hyper-V, Windows Vista, Interview, Internet Video