Their home page says:
We believe every individual has the power to make a difference. We exist for one single purpose: So that more and more people discover their own power to make good things happen.
The site started as an internal tool of the OmidyarNetwork? (PierreOmidyar? started EbayDotCom which also owns PayPal).
These are their ground rules:
For a basic conference wiki go to http://omidyardotnet.us