Tried it, but doesn't work with video calling.
Whoever is the one calling can setup their camera
but the reciever doesn't have any options to turn the camera on.
and on the callers iPhone/eVo it would say that the other person doesn't have a front camera
Tango should work. Check their website for a list of supported devices. Its free anyway. Must be installed on both to work and can work on 3G as well as wifi...