Thats cool with the buttons, Ill have to see how you did it. I might do something like that with mine in the 6000 wagon. Im thinking of using an iduino, theres a perfect spot in the dash piece next to the vent and shift indicator and the freeduino would probably be too big.
Also you can see the cruise buttons I made last year from an old end mill container. It works. For this car I dont care so much, its my winter beater.