check out what I saw in Sunday paper today;
UA roommates now bond online | www.azstarnet.com ®
Back in 80's when I went to NTID, I have changed roommate or room because the roommate I was paired up by random assignment by NTID was not my type or not a type to get along with or whatever. Although, back then I would get a mail from NTID telling me my room assignment and it list building nbr, which floor room number then finally a student's name and address! I got a directory for first year student which I sent photo to so I would look up to see who my new roommate is. After arriving, it takes a while to change roommate or room through a processes.
but now, they use facebook or myspace, it make their life easier and can change room ahead of time before they move in.