I just bought an ASUS PDA/GPS, it works great except the in car adapter/charger/cradle blocks the headphone jack and I'd like to be able to use the MP3 player function in the car (via my car stereo).

So either I buy a new cradle with a new power supply (as they're integrated now) or as the PDA has Bluetooth I find some sort of Bluetooth FM transmitter that will let me do it wirelessly.

Any ideas?