Hacks and mirrors. Plus you actually have to set up a voice call in parallel. Idiotic considering all my phones have been able to do this since, oh, 2004 or so, but an amazing hack in the iPhone context (via Gruber).
Two-way Video Conferencing for iPhone
Created on Aug 13, 2007, 07:18 by Rui Carmo, not updated since.hack, iphone, mirrors, vt, wi-fi