iTrip Style LCD FM Transmitter and Car Charger with Remote for Apple iPod /Iphone/Itouch/Nano
The only thing I really like is the remote feature on this product.  I can't get the device to charge my Touch, and with my iPod, it has to be laying on my seat to actually charge.  It does however play well.  I don't have a long car ride but it would be nice if the device actually did charge without having to jiggle the cords