In a sign of the increased versatility of (and blurring of lines among) multimedia gadgets, the Consumer Reports engineers who test GPS navigators have just wrapped up their review of the XRoad G-Map—an application for the Apple iPhone.

The app is designed for the iPhone 3.0 platform and seeks to compete with standalone GPS units. Like Navigon, the navigation company which now focuses solely on software, XRoad is hoping you'll opt for a device that can also make phone calls and play music in addition to giving street directions.

The XRoad G-Map has eight map versions ranging from a one-time fee of $20 to $35.

To see our testers' first impression of the G-Map, see the Cars Blog post on the subject. Check back later for a review of Navigon's MobileNavigator app, also for the iPhone.