It's the same principle as any car audio system just with a different set of options and buttons. I understand how its differences but behind it's fascia and added features the setup is almost the same. Wiring and add-ons may be different but you don't see an Audiophile Forum, a Sony Forum, a Stock 00-04 Forum, a Stock 05-07 Forum, and a Mach Forum do you?
As I said I understand it's different but other than a different set of features and hookups I see no need to have a separate forum for what is essentially just another different radio.