I haven't started commuting yet, but will when the semester starts. The commute is just under 5 miles each way. My other mode of transportation is walking or catching a ride with one of my roommates. I don't think theft is a problem on campus, but not too many people ride bikes on campus. I will be using two strong locks though (Onguard Beast and Onguard Pitbull Mini.
Will post back after I commute a few times.