Hi Guys,
We've just released version 1.0.8. The new feature in this release is QuickConnect, which makes it really easy to use Player.IO with other login/registration systems, like Facebook and Kongregate. It even supports a simple registration system for just your game, complete with Captcha and everything.
Facebook integration is also really easy. One method call (PlayerIO.quickConnect.facebookConnectPopup()) will show a Facebook login dialog to the user and take them through the login process.
You can read more about the QuickConnect feature here: QuickConnect Feature Info
And dive into the documentation here: QuickConnect Documentation