iPhone App Enables GSM to WiFi/VoIP Switching

alias420 writes: "You can save on long distance and air time with the new 3G iPhone. iPhone Hacks has the scoop on an upcoming iPhone 2.0 App named 'iCall', that will let you switch between VoIP and normal GSM calls anywhere in North America. You can check out their recently released video proof of call switching in action. This software requires no hacks and will be completely official. Here is a little quote from the developer: "We are part of the Apple iPhone developer program. This is not an application for you naughty jail breakers ;-)""