Re: A decentralised facebook
@WatAWorld: "A personal website is not an FB equivalent."
In this scenario the personal web site isn't the facebook equivalent, it's just the data store. The client-side application that aggregates the information is the facebook equivalent.
You're right that facebook's immense gravitational field looks pretty irresistable at this point. But with increasing levels of dissatisfaction, as evidenced by this article and its comments, there could be an opening for an alternative. The internet is littered with the carcases of once-dominant behemoths.