The german (alledged facebook ripoff) MeinVZ/SchülerVZ/etcVZ seems to do something in this direction with its OpenSocial interface. Instead of exposing your rea

The german (alledged facebook ripoff) MeinVZ/SchülerVZ/etcVZ seems to do something in this direction with its OpenSocial interface. Instead of exposing your real account, you can generate additional pseudonymous personas that look just like OpenSocial accounts for external apps, but can only access those data from your profile that you actually authorized for this persona. This dos not address the data export problem, but helps keeping the things a user want to keep private private. I think this is a beneficial effect of the rather strict data protection laws in Europe. Especially since one of the *VZ properties explicitly targets minors, they had to come up with a novel solution that actually takes user data protection into account.