Can I easily sync/import Facebook Event attendees with a CiviCRM Event participant list?
I was using drupal to create a facebook event when a civicrm event was created and add the participants.  There was a change in the facebook API that no longer supported post types for event objects.  I'm not sure if that allows event registration though.  The idea was using The Drupal Facebook Post module.  and civicrm entity which created a rule on event creation or update and did a post to facebook.  It worked pretty well and if the API supports adding people to an event you might take that approach (shouldn't require any code.)  Please update us if you explore this approach.