[Ivan] made something special with this car stereo hack. He altered the head unit to play MP3 files from USB and added an auxiliary line ... the USB port and MP3 player display.

A device that enables a digital music player to work through an automobile's audio system. Generic MP3 car adapters work ... Many new cars have an auxiliary audio input socket on the dashboard ...

using debian on a powerbook g3 233mhz (lombard), a kensington auto/ac/air adapter and crystalfontz lcd screen with usb->serial adapter you can a pretty slick (and inexpensive) in car mp3 play for ...