masterchief819:
1. What kind of bike do you have now, OR, what kind of bike have you ridden before, OR, what kind of bike do you most like the looks of?
2. How do you intend to carry your junk? (The Coffee, above, has a rack you can strap stuff to.)
3. "Oh sry"? Is your keyboard broken?
4. Do you ever, ever forsee yourself driving in the evenings or early mornings?
5. Where do you live? What's the climate and traffic like?
6. How will you get to and from school when (if) you don't use your bike?
The bike that's been mentioned above, while not exactly what I personally would want (I'd prefer more gears), looks to be an excellent one for the price for someone who's commuting. It just needs lights.
This bike, for what it's worth, requires a little more maintenance and costs a little more than you want to spend, but looks less frumpy.
http://www.performancebike.com/shop/profile.cfm?SKU=24141&subcategory_ID=3040