the true facebook killer is going to be a "social markup" standard and its many implementations that has the potential to surpass the power the facebook platfor

the true facebook killer is going to be a "social markup" standard and its many implementations that has the potential to surpass the power the facebook platform gives to the advertiser, not another centralized service. (note how hosting your own social hub elegantly solves any privacy concerns you might have) given the amount of work that goes towards this (not much), I don't think facebook has much to worry about.