Hi M.
Congratulations! Depending what you would like for your birth, there are several options available in the Chicagoland area. I'm pretty familiar with them since I recently did all the research -- we had our son at home a few months ago.
The number of homebirth midwives in the area is dwindling, in large part due to the changes in legislature regarding midwife certification in the state of Illinois. Basically you have your choice of a few fully certified midwives and several direct-entry midwives. There are also several doctors who attend homebirths. HomeFirst is a large conglomerate of doctors who do so, though I have heard mixed reviews and personally did not care for their approach. There is also Dr. White in Franklin Park and Dr. Elvove in Libertyville. Check out this page for a list of other providers. http://www.birthlink.com/providerslistset.html
This does not include all the providers in the area, though, only those who paid to be listed with Birthlink. It also does not include any direct-entry midwives.
If you want to talk about this more, please feel free to e-mail me at ____@____.com of luck to you and wishes for a wonderful birth experience...
A.