I'm sitting in the Andy Lee's keynote at TechEd Amsterdam. He's just described some of the great features of virtulisation (and he's just announced that each delegate is to get a copy of Virtual Server enterprise edition). He also announced, I think, that Virtual Server is on it's way out as a separate product. What will be coming is a hypervisior, a thin layer of virtulisation, similar to VMWare ESX, but built into Windows Server. This sounds really cool, and I'm looking forward to seeing more details about this.