Hi - I apologize in advance for my dumb questions about MobileNavigator Europe but I just got my iPhone 3GS and downloaded this app so am trying to learn everything in 24 hours before I go to Europe. So here's my question: if I use MobileNavigator Europe in France to drive, using the GPS, am I charged for data roaming? And if I were to check Google Maps, am I charged for data roaming? Trying to avoid huge charges. Thanks for your patience!