Dutch tech site All About Phones claims that Google Maps Navigation will get a true offline mode later this summer. In December the Android app received an update that cached routes and the surrounding areas, but without a data connection you still couldn't enter a new destination. A source inside the Dutch telco industry said that Goog would removing the requirement for coverage -- an obvious next step for the nav tool, especially with Ovi Maps bringing its turn-by-turn prowess to WP7. The move is also bound to be anot