www.chatroulette.com
A website that connects webcam chatters to other random chatters all over the world. Developed by a 16 yo in Moscow, Russia, and supported by 4 remote programmers.
The link is a short video about using the site, which strangely, has little information about using the site, its creators, etc. There is one small link to
"Users online:
∞" that links to a Google site that charts the number of people in the world, including a filter by country.
http://vimeo.com/9669721