Present on my university campus, too. While a lot of the backend uses Mac OS X, most of the student-accessable computers are running some form of MS operating system. One lab offers an older version of Gentoo as an option, but it's the only place where I can use a free system on campus other than my dorm room. Furthermore, due to drastic price cuts (the school has a contract with Microsoft to allow their students onto the local "site license" for 10x the cost of media), there's little incentive for things to change.
I have been recommending free software to anyone who comes to me looking for computer help, and have even distributed LiveCDs of Ubuntu to anyone who comes to me for technical support in an effort to get people to consider leaving Windows.