I'm originally from the 'burbs - but I have to say Chicago is a great place to visit, and especially to eat. I think the two things I miss most about the area are the arts and the eats and it's hard to decide between the two.
I have never, however, seen a "tour bus" in Chicago. If they really have any, that's news to me. There are, of course, many boat tours you can take along the Chicago River and also along the Lake Michigan shoreline.
The museums in the Grant Park area include the Art Institute and (moving south) the Field museum, the Adler Planetareum, and the Shedd Aquarium. Farther south along Lake Shore Drive is the Museum of Science and Industry. Some of the museums have free days and they're all incredible -
most of them are hard to explore in only one day. There are also a lot of other, smaller museaum in the area (the Oriental Museum, the Museum of Modern Art, etc.).
Chicago IS a big sports city. The rivalry between the Cub fans and Sox fans is always nuts this time of year. (Personally, I think anyone willing to subject themselves to three hours of boredom injected with possibly one to two minutes of a few out of shape, overweight, overpaid guys running - and paying to see this - yeah the're definitely nuts.) Apparently, they have a good arena football team, and - hope the wrong people don't read this or I'll be on the "hit list" - a sometimes decent futbol team. They play out in the 'burbs.
Also, I've found the best way to get around the city is to get a CTA (Chicago Transportation Authority) pass. A one day pass is $5.
Hope your trip is a go, Maggers, and hope it's as great as Chicago can be. If you're there around the 4th of July, I think somewhere around that time the Taste of Chicago is happening in Grant Park. Definitely worth checking out - plus free concerts every night with big headliners.
"True patriotism hates injustice in its own land more than anywhere else."
Clarence Darrow