I am waiting on my iPhone with Verizon. I was just curious about how it handles WiFi and Data. If a configured WiFi network and data are available, will it use the WiFi? And what if I go out of the WiFi zone, will it automatically switch to using 3G? Will I have to manually switch between WiFi and Data each time I leave or enter a WiFi hotspot? I would like for the iPhone to ultimately use WiFi whenever available and fallback to 3G when it's not.