In June, we told you about TomTom’s plan to bring turn-by-turn navigation to the iPhone 3GS. Now that TomTom has officially launched its iPhone app, this plan has become reality. The application works with many of the iPhone’s controls, including its multi-touch display and accelerometer for portrait / landscape viewing. The app can also interact with your address book to provide easy directions to an entry in your contact list. Like other TomTom navigational offerings, the iPhone app offers numerous points