Ask HN: What to see (where to go) in Chicago?

Greetings!

I'm going to Chicago for one week at the end of May and I'd love to get some suggestions on what to see there and where to go in regards to IT/startup scene. I'll be happy to meet with some fellow hackers over there as well.

About myself: I'm software developer (primarily .NET) who's, among other things is very much into rock climbing and startups (my latest project is https://spritesapp.com). If you'd like to learn more about me, visit http://volgarev.me/about or drop me an email at volpav[åt]gmail[døt]com.

Cheers!

Pavel.