I just bit the bullet and bought a new Mac Mini, its got a 1.83 ghz core duo, 1gb of ram, 80gb HD, and a regular combo drive. I also got a Carnetix P2140, and macpac cable from mp3car.com. In addition to that i bought parallels for my MacBook and so i could experiment on the mini. Right now I want to try out OSX/frontrow for media, then I'll probably go the boot camp route unless i really like FrontRow, and then I'll just run Nav stuff through parallels .
So now the wait begins, and i need to get the laptop out of the car to sell it on Ebay