Big deal. I have that for free on my droid phone.
Same here. The problem with this approach is that it requires cellular connectivity. My in-dash nav system uses a DVD map. It only needs the GPS input to calculate a route. The Google approach offloads the mapping/routing to Google. That's fine...if you have the connectivity to keep the maps refreshed. You can probably download a set of waypoints that can serve the navigation operation for the onboard GPS, but it still needs some kind of local base map for that to do the job.