See also: Network | Collaboration
Wikipedia – Metcalfe’s Law (http://en.wikipedia.org/wiki/Metcalfe%27s-Law)
Metcalfe’s law dictates that for two-way interactive communications, such as e-mail or p2p between computers, the value of the network rises proportionally to the square of the number of users.
Wikipedia has a detailed page on the networking effect (http://en.wikipedia.org/wiki/Network-effect) of this law which covers the economic consequences for information in a wired world.
TakeDown.NET -> “Metcalfe%27s-Law”