Facebook Ultimatums

Source
A new Facebook app called Ultimatums lets users float an idea, set
an arbitrary "tipping point" and track group members' commitment to their
common goal. Once a critical mass of people has pledged support, a
predetermined action -- like a boycott of Ford Motor Company or plans to only use nickels to purchase public transit fares -- is taken.
The app, launched Tuesday by Andrew Mason, founder of consumer activism site The Point, could help mobilize the group potential of Facebook's 66 million users.