I supose the answer is covered from a sandbox / unity webplayer standpoint...
Just wondering how it would be possible to allow facebook logins in Unity application types: standalone, and mobile as it seems every facebook api example involves the end user loading a mini browser window login.
Too bad there isn't some code to execute auth on the serverside to deal with http requests behind the scenes.
As it stands the FacebookOAuthConnectPopup() isn't available for .Net or Unity in order to retrieve the access token.
BTW: guys great work, I like what you are doing with PlayerIO. I'm from the US and look forward to testing your sevices with Unity's many game Player offerings.