How are Social IdP organizations identified by various Social2SAML gateways?
How are usernames from a given Social IdP represented by various Social2SAML gateways?
To begin to answer the above questions we are contacting people at various social-to-SAML sites including NorduNet's IdP Proxy, OpenConext's OpenSocial container and Chris Hubing's social-to-SAML gateway at Penn State.