Somewhere someone is starting a single App framework API company with the idea that many of the smaller social networks won't have the ability to curry favor with developers. This single framework will look like today's widget companies but tie into an open standard for the "social graph." The smaller social networks will then join up and adopt this API in the face of MySpace, Facebook, Bebo, etc opening up in their own proprietary ways.
My guess is this exists already. Who? And do they have a shot?
Edit: Oh, we're doing it :-)