Last I checked, MIT\'s Information Services department also supported only XP Pro. (Within the Windows family. They do also support Macs, and, of course, Linux and Unix.) Thing is, MIT has an XP Pro site license, so anyone on campus can get it free.

Hmm... Looks like they're currently phasing in Vista support, as well, but don't recommend it.

When in doubt, think about penguins. It probably won't help, but at least it'll be fun.