We are interested in using Facebook as the authentication provider for SSO to Salesforce.  However, the setup instructions from Salesforce indicate that you need to create an application in Facebook.  I do not know what this application is or what it should do. Also, once you've created the application, how does this application then get distributed to all users so that they can login to Salesforce via Facebook?

If anyone has more information about this or suggestions on how to accomplish SSO with Facebook,  I would appreciate it if you would share your knowledge.

Thanks in advance

Kent