"With the exception of social networking features that I intentionally left out to avoid a second privacy firestorm..." I think that about sums it up. It's ve

"With the exception of social networking features that I intentionally left out to avoid a second privacy firestorm..." I think that about sums it up. It's very common to see many implementations of the same idea, with some being more successful than others. We all understand that MZ may have borrowed too liberally for his "adaptation" of the idea, however, his adaptation was actually popular. For all I know the dude really is a sociopath ready to destroy the online reputations of every facebook user, but that's beside the point, at least in regards to Greenspan's core argument.