With your average non-connected GPS unit costing hundreds, we can easily get behind the idea of an ad-subsidized navigation hardware company that hooks its users up with heavily discounted (and possibly eventually free) GPS devices own or borrow (like, say, from a rental car agency). And that seems to be the angle adNav is after with their new supposedly forthcoming Boomerang GPS device, intended to be a cheap alternative to the other guys, even incorporating some less frequently used features in the GPS world, like WiFi and cellular data to browse the web or collect data (read: ads), and other connected travel utilities (translation, weather, flight tracking, etc.). Will adNav actually begin trials in San Francisco next month, as claimed? We'll let you know.

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