Facebook is harnessing the power of the social graph, and has certainly adopted an expanded definition of what 'currency' means. It's time for the rest of us to hop on board.
"Welcome to the community wiki for Davis, California, USA! This project is an interconnected community effort to explore, discuss and compile anything and everything about Davis - especially the little, enjoyable things. This entire site is maintained by the people who use it: Everyone can edit this website!"
In a Design Journal article (Wood, 1990) I argued that "the entrepreneur; fixer, trouble shooter and exploiter should give way to the more socially responsible entredonneur; the giver, not the taker." One way in which we use the term is in creating a continuum that reconciles the 'entrepreneur' with the 'entredonneur' (see fig. x). This device enables us to chart a gradient of values with 'taking' at one end, and 'giving' at the other.