Virtual Server R2: Compatible or what? (bonus: Hypervisors)

I was told yesterday I can't possibly overestimate the importance of virtualization to the Enterprise. 

We're talking about scenarios like production server consolidation, business continuity management, enabling a dynamic datacenter, and of course, test and development.

Check this out.

https://vpc.visualwin.com

This is a list of over 1000 operating systems that work on Virtual Server 2005 R2, which you can filter and search.  Assembled by an MVP.  Wow.

Also, I always wondered what "Hypervisor" meant.  Hypervisor apparently means "bare metal."  It is a feature of the operating system, based on industry standards, and it's a role of Longhorn Server x64 Edition. 

If you want to sound cool around your IT Pro friends, you could just paraphrase The Graduate and say something like:

 "I want to say just one word to you.  Just one word.  Are you listening?  Hypervisors."