Connectivity is not a problem, I have a mobile hotspot so I can use WiFI pretty much everywhere, don't need 3G. If I get the WiFi-only iPad and forgo the built-in 3G modem, what am I missing? I'm particularly interested in GPS and related position location apps. I don't have an iPhone so I'm not sure what's in the apps store but how does Navigation and Google Earth and other apps that depend on GPS...how will that work on the 3G iPad compared to the WiFi-only model? In other words, what will the 3G iPad offer in the area of GPS that the WiFi-only model won't be capable of? This will help decide whether I purchase the iPad on Day 1 or Day 30. Thanks.