this is the closest thing that i know of, or have seen so far. it is not exactly cheap, but will allow iphone/itouch control of a car.
SEMA 2009 - iPhone Hydraulic System
Is there such a thing?
I'm picturing a barebones box with some form of basic input and output that could be paired with a phone as an earpiece (the idea being I could connect my own mic and line-level aux connection to it).
Bear with me if this has been asked before, having trouble finding anything via search (not sure what I would search for). Any ideas?
cheapest and easiest way is to get the cheapest unit you can find off ebay that does full duplex and hack it up...it would be very easy to add a headphone and mic jack.