I use a very obscure phone (HTC Universal/iMate JasJar) primarily targeted at Europe and the Mid-East. I am waiting for my TCH (due today or tommorow). Several months ago, I test drove a new Prius, w/ Nav. The bluetooth functionality worked flawlessly for dialing and recieveing, but I did not try the address book sync stuff. Bluetooth headset/hands free profiles are pretty standard, my guess is they tested certain phones explicitly, and those are on the list. But anything that adheres to the spec should work.