Wondering if anyone has purchased any of those ebay el-chepo fm transmitters and how well they work? I dont have a AUX jack on my stereo in the car so i wanted to pick one of these up.. I did look around and apparently the FM transmitters from the 3G and 3GS should work just fine with the iPhone4. I couldnt find any other threads on this specific topic I'm just looking for something cheap and preferably charges it too while plugged in and that works. Trying to use the iP4 in the car and using one of the Radio Apps.. getting sick of burning cds and trying to keep up with the latest tunes.. Anyone out there made a purchase on ebay about this?