Facebook + Other site as login for PHPRunner App!

FunkDaddy,
just wondering - what kind of functionality you expect from Facebook login.
Using Gigia or some other widget you can allow user to logon using Facebook login. You can get their name, some kind of ID etc. What's next?
What permissions you want to assign to this user? How do you distinguish between first time user and returning user?

My original thoughts are to allow for new user registrations via the facebook login... the unique user key passed from facebook or other site could be create a new user in the a users type table (maybe concatenated with different category values for each of the different sites).
I simply view this as lowering the barrier to entry for web applications.., meaning one less online account for a prospective user to have to remember a username and password to access it.

This should be a pretty straightforward task. Take a look at step 2 at http://wiki.gigya.com/001_Authentication_Quick_start
You can specify login.php as a return URL and implement BeforeProcess event. In this event check if variables $_GET["loginProvider"] and $_GET["loginProviderUID"] are populated. If yes, check if this user exists already. You'll need to have loginProvider and loginProviderUID field in login table.
If user doesn't exist in your database create a new record populating those fields. Then populate security related session variables like $_SESSION["UserID"] and redirect user to one of pages of your app.