I'd recommend checking out University of Michigan's entrepreneurship club, called MPowered: http://mpowered.umich.edu/

I don't actually go there, but I subscribed to their mailing list when I considered starting something similar at my college. Definitely a great group to model!

NC State also hosts some great entrepreneurship events for their students, including spring break trips to Silicon Valley and China. http://www.ncsu.edu/ei/events.php

Finally, I'd say Stanford BASES pretty much sets the standard for student entrepreneurship groups. http://bases.stanford.edu/

Good luck!