Experiences with help desk software?

[las.livejournal.com]

I just got hired for a split web design/tech support job by a university department. We've got 300 computers, mostly Win2000, 2.5 tech support staff, and no trouble ticket system. Need help desk software; I'm looking at several packages that will do what we need it to do, namely, let the faculty and secretaries fill out a trouble form via their web browser and also be able to see what's in the queue in front of their issue so they will be a bit less likely to call 5 times a day to ask when someone will be out.

So, doesn't need to be fancy, but it's gotta work and not be too complex for users. Anyone have experiences with Liberum, or any other packages? Or anyone got a pointer to a good site of help desk software reviews?