Aiming automotive gurus who require performance monitoring, data charts, and customized gauges / diagnostic meters, the Linux OS hold the fort on DrewTech's data acquisition system named DashDAQ with 1337 programming skills, which can be described as a cross involving a data acquisition system, diagnostic tool, automotive gauge display, and a hand held computer.

Featuring a 4-inch QWVGA touch screen, adjustable backlight, 200MHz ARM processor, 64MB of internal RAM, MMC / SD card slots, USB 2.0 connectivity, a serial port, and support for optional Bluetooth / WiFi, the system can exhibit virtually everything you wish, and may double as a navigation monitor, CarPC display and flashy tachometer to boot as well.
Also you may connect DashDAQ to OBDII, EGT, O2, and other vehicle sensors. You can get one for $595.
Via: engadget