I have a 8" LCD with touchscreen that loses calibration with each hibernation. After 3 re-boots its off by almost 3/4". Sooo...

I rewrote my system for a small keypad! It just sits on the pass seat and I don't have to actually look at the screen to run the system. $34 from Compusa with 2 USB ports at the top.

"/" ,"*" and "-" starts the apps.
4,6,8,2 move the screens.
"+" and Enter control the volume.
0 is the pause.

Much happier not to have to look away from the road at 80 just to change the volume

Now to get a 4 way and 2 way switch from a game controller and fit it to my steering wheel. Hands not even off the wheel!