So we have this, Open ID, Facebook, Twitter, Google, Microsoft Passport/Live ID, and probably like five other major players I'm forgetting. I apologize for being pessimistic, but this just doesn't seem like a solvable problem. I want it to be solvable, but players like Facebook benefit far too much for them to not push their particular version of "universal" login on everyone. Every player seems to think they are the One True Solution... But so far, it's all one big mess. I don't see it getting better any time soon.