Jon,
The commute from 'the city' to warrenville could really vary, depending on where in the city you lived. Lots of young people tend to settle in the north side and then either leave for the burbs when its family time or pay the $ for a house in the city. (thats a gross generalization of course)
The train system that goes out to the burbs is the metra...
www.metrarail.com
The train system in the city is...
http://www.transitchicago.com
If you want some city 'feel' and be a little closer to work, you may want to look into Oak Park.
Good luck! Its a fun town (especially in the summer). Worst case, you can always tuck your tail between your legs and head back to omaha
