Well, a while ago I raved about Madras Palace in Westmont. I know that zim was asked me about it, and after finally going back there I got their business card. The address is:
679 North Cass Ave
Westmont, IL 60559
It is in a strip mall with several other ethnic restaurants next to a Jewel Osco at Cass and Ogden.
I would recommend the dosai, the channa batura, and the thalis, and take home a biryani...