You need to get the college kids' attention, on or off campus!
One way to do this is to offer a chance to win something that would be valuable to them - - maybe everyone who buys a year's worth of services from you would be eligible for a drawing for the prize (an iPhone, an iPod, a $500 bar tab at the nearest hangout to the campus, an acoustic guitar, a Blackberry, a $500 gift certificate to the campus book/souvenir store, or the local favorite donut shop, or Starbucks, etc.... anything you think they'd get excited about).
Another way is to do something slightly outrageous that will get a lot of attention on campus - - maybe you have a local musician play some popular music on a main walkway or a place outdoors where students gather between classes, and you give out promotional t-shirts or notebooks or koozies or something that they might use while advertising your products. Or maybe you have a parachutist land on or near campus with a huge company logo on the parachute. (note you'll need to ok these ideas with your company and with an official on campus before doing any of these! be sure to also alert the local media, you could get some free publicity out of this!)
Be sure to hit the dorms and nighttime hotspots in town, too!
Check out this site for some ideas on how to create a flyer that will appeal to the college market http//www.cdbaby.org/stories/01/03/24/4730888.html
Here's another site for tips when marketing to college students http//collegestudentsali.blogspot.com/2006/03/10-tips-for-successful-college.html
To get ideas for background or themes, try looking at MySpace and FaceBook, and www.whateverlife.com.
Best of luck, and have fun!