Engadget takes six iPhone navigation systems for a spin
The review covers everything from Mapquest's free GPS app to the far pricier Navigon MobileNavigator, along with progs that span the price spectrum from CoPilot, TomTom and AT&T. There's a great breakdown of available features and functionality, along with initial and reoccurring costs, but in the end, only one gets the Engadget tip of the hat. Check it out.
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