I'm getting it for about the same purpose.

I would love to make it interface with my car alarm, door locks, speedomitor, and that kind of stuff. I would of liked it to have a ethernet jack on it, but I guess a usb ethernet card will have to do.

It would just be good to have it say "Hello Patrick" when I open the door, and "Hang on" when I start moving after I start up the car.