I've successfully develop Facebook Single Sign-On. The question is: is it possibile to send a "status" parameter in the requesting URL? I mean something like "https://test.salesforce.com/services/auth/sso/00DXXX00000XXXXXXX/MyFacebookProvider?status=XXXXX" ? this whould be really helpfull because I need to create the User/Contact in the Auth.RegistrationHandler on certain conditions that not rely on Facebook OAuth response. Do you have any hint?