my friend lives in a high bike theft area, and she has a small cable that she locks her brooks saddle to the frame with. I second (or third or fourth) the two lock method and also add, never, ever leave your bike at school over night. If you are sick or get a ride home with friends, go back with a car and pick it up. Bikes mainly get stolen around here as crimes of opportunities. Also, can you register your bike with campus police? It's free to do here (costs a bit at the university I did my graduate work at), and helps if the bike shows up at a lbs as a 'used' bike for sale. Take pictures of it so you have 'proof' of ownership - and (as someone else mentioned) jot down the serial number. Other than that, make sure you have good karma in your life and your bike will too (hopefully)

Happy commuting on a super cute bike - what about a picture for us?