Or you could buy a Dell Streak, FM modulator and a vent mount.

That way you could navigate, call and stream $hit kicker music to your stereo all at the same time.

I've got the Streak, am looking for a decent vent mount, and will get a radio that will accept an AUX or USB direct connection.

But if you beat me to the punch, you could share the results with the board.

PS: Same thing can be done with the IPhone if your eyes are good.