I bought a T-Mo Wing in 2007 (the G1 wasn’t out yet), was anxious to try stereo Bluetooth so I bought a Sony head unit with A2DP support. After pairing the devices I discovered to my disappointment that I needed to go through that somewhat painful process all over every time I shut the car off or even just walked out of range with the phone. The hands free and the stereo BT were two separate setups on WinMo, and while the hands free worked fine the A2DP was all but unusable, so I gave up and listened to CDs.
Last week I took the plunge and brought home a G2 then loaded up a few MP3s just for fun. (I also have 2 Sansas running Rockbox) The law here in Washington state is hands free only so I paired up my new phone with my old stereo. To my surprise both the phone and music icons immediately lit up on the Sony. I tried the Android music player and it works like a charm!
Bluetooth sounds way better than the line in cable to me, the front input on the Sony seems seriously attenuated… I guess to compensate for all the different levels that could be presented from a headphone jack. But the BT is crystal clear and just as loud as any other source. Pairing is completely persistent now as well, it doesn’t matter what I do or in what order I do it the two are ready to go every time I get in my car.
Sorry about the long first post. I’m just happy as a clam with my new phone. Now I'm off to find info about the best way to organize music for the Android player.