"Neue Öffentlichkeiten im Social Web" [New Public Spheres in the Social Web], lecture by J.-H. Schmidt at the conference "User-ignored Content. Journalismus für die Generation Internet" [User-ignored Content. Journalism for the Generation Internet] of the Gemeinschaftswerks der Evangelischen Publizistik, the Media Commissioner of the Protestant Church in Germany and the Hessischer Rundfunk in Frankfurt on 25 June 2009.