I'm driving across country this summer. I'd like to be able to use my iPad for mapping and gps-type features. I'll also have my iPhone 4 with me too. Ideally, I'd figure out a way to get "my maps" from google into the google map app in the iPad and iPhone... But so far, my research has proven unsuccessful. Google Earth will do it, but it isn't exactly a good gps app, it's a little laggy/buggy and even google doesnt recommend using it via 3G. I've downloaded mapquest and that got good reviews, but it's an iPhone app... Doesn't make the greatest use of the full screen of iPad. I'm not interested in the Tom Tom apps for mapping in different regions... The reviews were not exactly stellar, and the apps are expensive. Any suggestions you can offer would be great... Thanks!