Tango is a video and audio chatting app that does what FaceTime should have done. It works on a 3G (or a 4G) network. This free app was released last week and I have been testing it over the weekend.
It performs pretty much as advertised using it on my iPhone 4. You can make and receive calls over either a WiFi network, or over the cellular network. Even better, the app works with a variety of Android phones including the Droid, HTC Hero, Evo and Nexus One so you're not stuck with just
