Milwaukee (Wisconsin) has a thriving tech startup community! Check out Startup Milwaukee at http://www.startupmke.org and the recent Startup Weekend Milwaukee at http://milwaukee.startupweekend.org (which was a great success).
Madison (Wisconsin) also has a great tech startup community. Check out Capital Entrepreneurs at http://www.capitalentreprenuers.com.
Also, check out http://www.builtinchicago.org/
And, http://www.gener8tor.com/.
Where's Midwest tech? Just about everywhere. Just Google it!