So i realized today on my way home from work that my cars Clarion CD deck has a USB connector for hooking up thumb drives to play music off of them. I figured this HAS to work with the G1... and it does! I was able to hook the G1 charge and play the music off the SD card through the G1 with ease. Just set the G1 to act as a usb drive, and you can play music and charge your phone via USB while driving. So keep that in mind if you're going to be getting a new car CD player, get one with USB (pretty common on new CD players) and you'll be glad you did.