Van Galder Bus Company, 800-747-0994, provides transportation from Chicago's O'Hare Airport and the Chicago downtown Amtrak station to the UW-Madison's Memorial Union (two blocks from the conference site). The trip takes about three hours and buses leave every couple of hours.

From O'Hare to Madison:
(pickup across from airport Hilton and exit 5e at International terminal; get off at last stop, the UW-Madison Memorial Union)

Departs at 6:30am, 7:30, 9:00, 11:00, 1:00pm, 2:30, 4:00, 5:30, 6:15, 7:30, 9:00, 11:00
(the pickup time at the international terminal is 30mins earlier than the above times)

From Madison to O'Hare:
(pickup at UW-Madison Memorial Union)

Departs: 2:20am, 5:00, 7:00, 8:30, 10:00, 11:30, 1:00pm, 2:30, 4:30, 6:00pm

The cost is $18 each way.

The above information was obtained by calling the 800-number above; you probably should call it yourself to double check.