Does anyone know of a chip friendly dealer in the Northern VA area?

I can't claim first hand experience, but FWIW I got the following note from a friend in Alexandria,VA 2 days ago on this very subject:

"I just got a call back from the Heishman's Audi/Porsche dealership down here. The service guy I spoke to did not state that they endorse hot-chipping, but there was no obvious way for them to know that the car was chipped if a warranty question arose. As long as the 'check engine' light or other similar indicators didn't show a problem, No big deal."

Thanks for the info. Maybe I'll get this done yet!!!