I'm not into this sort of stuff (twitter, facebook and raving on the whole web 8.2 or whatever we're on now), but this talk distills down the way it can be used for good (as opposed to facebook type evil).
Emily Pilloton on TED
I think maybe the best you could ever hope to be able to say about any kind of design is 'yeah- something there is right'. Project H in this video has got something right. It's what design strives to be I think.