Sorry for the late reply...
I've lived in Indiana most of my life (120 miles from the track) and have yet to see a single Indy 500 in real life! This year I even had 2 different sets of tickets to go...but I really hate gianourmous crowds...lol. I don't think I even watched it on TV this year.
I DID watch the IndyCars at Mid Ohio though...love the right hand turns a lot!
At the Speedway I was at the last USGP F1 race in 2007 (great weekend!) and have seen NASCAR quals but never the full race. I have personally raced at the smaller road course in Indy at ORP where they hold the NHRA Grand Nationals and where Nationwide and Craftsman Truck Series race (we drive on the dragstrip for our front straight and go around the oval track).