Enabling a content publisher and a receiving user to control access to content updates based on user relationships. The content publisher and the receiving user may assign a relationship degree, relationship category, and/or relationship rating to each other and to other users. The content publisher...http://www.google.com.hk/patents/US8166069?utm_source=gb-gplus-share專利 US8166069 - Displaying aggregated new content by selected other user based on their authorization level
