Congratulations! I got in a couple months ago for Winter '10 (starting in a couple weeks) so I understand your excitement. Not sure how often you've been to the campus but it is awesome and the town is amazing.
Maybe some alumni can post some tips for the OP (which I can also check out :P) about campus and the school. The only tips I know are from my relatives who go which are "try to get into the North or South dorms and not the towers" and "Join a frat"