I've been using some version of X at work (also a University) since early-March.
Our IT people hate Macs, but most people don't really care what they think. I'd guess 25% of the faculty and secretaries use Macs.
Ironically, I've got much more freedom with a Mac at work. The Windows 2000 people are held on a very tight leash - nothing on their machine without permission, all log-in and net-boot crap. They can't even install little shareware type programs without approval. The IT department has gotten super-paranoid about copyright issues and piracy.
Funny, because I've been using Office X for over a month.
I don't think the Windows people would get away with something like that, at least not the average users.
I have a Dual 800 at work - not that I need it. Really, 90% of what I do is Office, email, statistics (in Classic mode), and simple programming.
Office X was the kicker, but before that I used AppleWorks, Office in classic, and TextEdit. I don't think I've booted into 9 once since March.