] When you join omidyar.net, you start with a feedback bank
] of 10 points. Your feedback bank can be given away, one
] point at a time, as either positive feedback or negative
] feedback to any member, workspace or discussion.
]
] As you use omidyar.net, your feedback bank will increase,
] based on how you use omidyar.net, and what you do. You
] basically get more "credit" in your feedback bank the
] more you contribute. If you simply "lurk," which means
] you don't ever post a comment or start a discussion,
] etc., your feedback bank will grow far more slowly. If
] you are an active discussion participant, and you
] contribute to a group's workspace, your feedback bank
] will grow more quickly. In fact, even the act of giving
] feedback will help your feedback bank grow. If someone
] gives you positive feedback, both your score and your
] feedback bank will increase by one.

Looks interesting..

Omidyar Network