The iTunes App Store [iTunes link] has the Navigon MobileNavigator GPS iPhone App for $69.99 for a limited time. The features voice guidance, 3D map views with road signs and lane guidance, speed warnings, day and night modes, navigation to contacts in your address book, and more. It runs on an iPhone 3G or 3GS running OS 3.0 or later. Deal expires August 15, 2009.