Yeah, it's not a bad idea to have another switch to disable the "ignition" on feature, sort of a valet mode for when the vehicle is at the shop, or when you just don't want it on, but that's just more wiring/switches to deal with, and more stuff to go wrong or to forget about. Be wondering why your system isn't coming on, and realize later you had switched it off by accident, or one of your kids did it. lol
If you have a car alarm, and you put it in valet mode for the mechanic, just set up a relay to disable the carpc whenever the alarm is in valet mode...
haven't found anything for that bluetooth automatic audio level adjustment SPElectronics, but i see SKYPE has a similar feature if your using winamp, and get call through skype, it automatically adjusts your music level. OK as for the LCD, even though it will be mounted into the dash bezel, i want to be able to adjust the screen's angle for better viewing, i'm trying to put together to the components for adjusting the screen...Sorta like how the G4 Infill is.
Ok SPElectronics i found a website that states that the stereo system will be muted when a call is connect.