My idea is automatic (or manual) updates to sync it with your pc (home server) via wireless. A virtual mobile extention of a household media center. You could set it up to sync when you tell the system to or when you push your garage door opener or when you press a button on the stereo or just search for your local network whenever the ignition is shut off. This could be set up to detect a local network, or, if you don't have a wireless network, operate through a USB wireless system that just coms with your car stereo.