Critical Assumptions in Superdistribution Based Business Models - Empirical Evidence from the User Perspective - Sophie Ahrens; Thomas Hess; Tanja Pfister; Behrend Freese (41st Hawaii International International Conference on Systems Science (HICSS-41 2008), Proceedings, 7-10 January 2008, Waikoloa, Big Island, HI, USA, 2008)