Hey congratulations!!! :-) That's very exciting news. I'm finishing up my senior year of undergrad here at Wisconsin and it's really a great campus and a great community and city. Madison is such a great cultural center (unlike the rest of Wisconsin state). When you come, I highly recommend checking out all the many restaurants...I know the student budget is tight, but it's worth saving a few bucks here and there to check out the wide variety. Besides, you'll be a law school student in need of a treat every now and then.
I recommend the Sunroom Cafe on State Street for relatively inexpensive good food, Mickey's Dairy Bar on Monroe for breakfast (that's a Madison landmark; can't miss that), and Ian's Pizza on Frances St--where else can you find macaroni and cheese pizza? :-)
Good luck in law school at wisconsin, and again--congratulations!