Take a look at this link:
http://www.lthforum.com/bb/viewtopic.php?t=410&highlight=indianapolis and see if that helps. (Ignore the joke entries about Macaroni Grill and Olive Garden.) If not helpful, post here again and we can try some other options! One thing I will point out is that Indianapolis has incredibly poor public transportation, and is also a sprawling city, so let us know if you won't have a car and we can direct you to places in Downtown. Two rec's I can give right now: DO have lunch at Shapiro's Deli (
http://www.shapiros.com) and DO NOT get suckered into St. Elmo's steakhouse.