Okay, so it's not Wisconsin, strictly speaking...but I'd venture that a third of the visitors are from Wisconsin.
If you want the full skinny on fun at Six Flags, Great America in Gurnee, Illinois (yes, the Bears still suck), then head over to Mike Weinand's
http://sfgamnews.com/!
From the home page:
This site was created in July of 2003 and officially made its debut as Six Flags Great America News on August 1, 2003. The site has grown to include many features including Videos, Coaster Tracker, Forums, Pictures, and much more. We are dedicated to bring you up to date news and tons of information about Six Flags Great America located in Gurnee, IL. Summer of 2004 we expanded and brought tons of new and unique features, and our one year aniversary was celebrated with new forums. June of 2005 marked the merger of SFGAmNews and SFGAmPlanet
Mike is on the staff here at theBubbler.com
Enjoy!
Regards,
Keith