Here’s a cool iPhone App which is currently in beta but due to be released soon, probably around the same time as the SDK goes live, iCall.

iCall enables the iPhone to switch from GSM to WiFi on-the-fly in order to save cell minutes and bypass the hassle of manually changing over, check out this video of it in action.

iCall VoIP on the Apple iPhone from Arlo & Andy on Vimeo.

via Engadget