More worrying research about videoconferencing

As someone who really really doesn't enjoy business travel, I'd like to believe that videoconferencing is just as effective. This paper from researchers at MIT suggests otherwise - that physical presence actually helps build trust and understanding between participants in a way that virtual presence doesn't. If the paper looks too daunting, here's a CNN article that reports on it.

The paper is all the more interesting because it's written by Mark Mortensen, who has done lots of proper grown-up research on distributed teams and the role of technology in helping to manage task conflict.