Just in California. They were going to have it a few years ago in Chicago but backed out at the last minute. A lot of people drove to McCormack Place to find out that the show was cancelled.
You still have the iHobby show coming up in October or November at the old Rosemont Horizon, right across I-294 from O'Hare. I think that it's called the Stephen's Center now. HUGE shoe, I went there once. It puts RCX to shame.