Google Maps Navigation already have performed on iPhone and other android handset complete with free turn-by-turn app. This is Google’s innovative product which become a break-trough idea over the stagnant. Google Map Navigation still has no a constant data connection but it will give you new mapping data as long as you stay on the route. Google not yet give a brief information or the detail improvement of their Google Maps Navigation but you can check on your own iPhone. Or if you want to get real connected with Google Maps Navigation, I think you should buy Google Nexus One.

[Via Slashgear]