Korean company APSI offers the C100, an in-car GPS navigation device that basically combines a GPS base station and a removable touchscreen PMP. The C100 system features DMB tuner with external antenna and Gini 3D maps.
The PMP serves as a touchscreen display when it is attached to the base station. The system also includes physical buttons when you are using it in car. The PMP can be used as a stand alone touchscreen media player.