i've noticed that the mac is really lacking a road trip planner app (like tripmaker) even though google earth is a bit of a start. i had an idea a while back to make a google earth plug-in for a road trip app, where it would work with google earth to plan stops for food, gas and routing for a comparable app to tripmaker and the such. the idea could extend to the iphone, but i'm not sure about that. does this sound like a good app idea, or does it need work? btw, i don't know much of anything when it comes to programming. thanks.