Logitech makes good computer speakers with subs (though it's kind to turn the sub low in the dorm) and I'm partial to Microsoft mice, which won't run you too much money.
Bring an extra bottle of shampoo/stick of deodorant, etc. If someone doesn't 'borrow' yours you'll appreciate not having to go out to get a replacement when you run out.
You'll want shower sandals if you share the shower with anyone else.
Get the biggest, sturdiest bag possible for your laundry. I'm talking big and thick. Don't bother with the little mesh hampers and 'off to college!' big box store laundry bags. Get a bigass canvas bag. I know too many people with cutesy mesh hampers that have ripped on the stairs to the laundry room.
A clip-on reading lamp is nice to clip to your bed so you can read when your roommate goes to sleep.
Risers are nice to have if you don't bunk/loft. They probably sell them at the school store, but they could sell out early.
A wee little potted plant can really make a difference in a stanky dorm room, if you're into that kinda thing.
My school gives out free Lifestyles condoms, which are passable in my opinion, though somewhat overused, along with hand lotion, for pranking. I prefer Durex Extra-Sensitive (thinner rubber), myself.
If they don't provide it in the room bring a big trash can, you'll appreciate not having to empty it every five seconds when visitors leave it full of popcorn bags and beer cans.
Bring more towels than you'll think you'll need...it's nice to have a clean one even if you don't feel like doing laundry for a while.
Hope that helps...2 years of college and 4 years of boarding school have left me quite well versed on dorm life...
