Just like we heard back in June, Navigon is taking on TomTom and anyone else who dares enter the full-fledged iPhone navigation realm with its snazzy new MobileNavigator application. Released today in Apple’s App Store for the North American market (the European version was released last month), the program only works with iPhone OS 3.0. Navigon claims that this app is the first on-board iPhone navigation solution from a major navigation company, and while TomTom was first to announce plans, Navigon is the first