I have a Droid Charge and my car has a USB port into the stereo. I have the MOG app (streaming music) and I want to play music from it in my car. When I plug in the USB the phone asks me if I want it to act as a media player or mass storage device. I choose Media Player. The car stereo will not recognize the phone. When I tell it to look at the USB port it sees no device connected (although the phone is charging). In the scheme of things this is a small issue, but I think it should work. Any ideas?