I found out today that when I use the headphone output from my Droid, I can feed the Google Maps turn-by-turn through my car speakers using the aux-in on my head unit. I can also play music out of my Droid in the same fashion. I can even do both at the same time! But here's the rub. The Google Map "Voice" is so loud compared to the music out of my Droid that if I have the music playing loud enough to hear. . . .well you get it. Google Maps blows out my speakers! There doesn't seem to be a volume control on the Google Girl, so I guess this is as much a feature request as a bitch. To be able to mix the Google Girl up a bit over the music would be, well, kick ass! D.