That would be a very logical place to start. I'll try doing that. Do I need to run the car for a certain amount of time after resetting the computer? I've heard 15-30 min after it reaches operating temp so that the computer relearns sensor information.

I did put a can of Sea-Foam in it tonight thinking that may help a bit should the IAC valve be dirty and sticking.

As far as a sticking throttle...
If I shut off the car when it's doing this and restart it, wouldn't the idle remain at the higher RPM? That's what confuses me, because if I shut it off and cycle power to the ECM, it seems to correct itself. That's why I think that Will might be on to something.

Thanks everyone for their input!!

Any other ideas are also appreciated!!