When I get my PCM back from ZZP I was going to get a Case Learn done, but every dealer I called nearby so far wants $160 (thanks for nothing!)
Can anyone recommend a shop that can do it for a reasonable price?

Surely someone near the Chicago area has a tuner and can help you out. I don't know much about the process, but the one I witnessed took no more than 5 minutes. Perhaps if you explain to them that you will not pay $160 for 5 minutes of work, they'll be more reasonable?

I tried that route - no luck

Yea good luck, those guys are ruthless. i got quoted 100 and even that was absolutely ridiculous. First they had no idea what i was talking about even with the procedure on paper and then they would tell me i didn't need it to be done. Avenue Chevrolet in Batavia did mine for 50, even that i think is a bit outrageous but it needed to be done so i cut my losses.

Yup, and GM wonders why they are no longer the top car maker. I think like any other dealership though, I think the service writers are just there for the job and benefits. They rarely have a clue what in the world they are doing. A friend went to a Toyota dealer with a brake problem. The dealer called her back telling her the entire gas tank needed to be replaced and it would cost her $1,500??? After I called them and pointed out they are nuts, they backed off and admitted a new gas tank would not help the braking issue?!

yea i hear you there. i refuse to go to any of the actual pontiac dealerships around here because i am fairly patient and reasonable, but the service department guys make me furious every time i go in there.

You might also check GP boards etc for someone local with a tuner/scanner capable.

Also..many mechanics have scanners capable. I know my buddy would willingly Case learn a car for $50 or less since it takes all of 5 minutes or less.