Originally Posted by dc/dc
But not SkypeOut as far as I know.
you can call anybody in your phone book via IM+. It is a bit clunky, since it is not full duplex. It is almost like nextel direct connect, where you have to press a button to talk and release to listen, but it can work over wifi. on 3g, it doesn't work quite as well. It is not an ideal solution, but it works in a pinch.