Didn't we just do this?
ST Charles, IL to Fort Atkinson, WI
http://www.bikeforums.net/showthread.php?t=427915
madison to kenosha: route?
http://www.bikeforums.net/showthread.php?t=428685
I think once you cross the Cheddar Curtain, you can ride just about anything between say Beloit and Madison. There is no -direct- route though.