hey gc2488,
on the navigation, I decided to wait for the mac mini w/ a xenarc touchscreen instead, hook up a nav system through it or use a bluetooth phone to share internet access with it (verizon unlimited internet on treo is $50/mo) and use mapquest, expedia whatever you want.
Tomorrow apple is expected to announce mac mini with intel processors so you can run windows (if you really have to) and mac os x on it. just another alternative. And it has Front Row, nothing google is going to come out with will be cooler. A computer with touchscreen and internet access at your fingertips in your car anywhere. I really hate google right now though.
cars with mac minis