Preface / Willms Buhse, Sören Stamer-- Prologue / Götz Hamann -- A definition of Enterprise 2.0 / Andrew McAfee -- Lessons from the past : computer-supported collaborative work & co / Michael Koch -- Enterprise 2.0 : learning by doing / Sören Stamer -- The risk of control / David Weinberger -- Creating value interactively : challenges for company management / Ralf Reichwald, Kathrin M. Möslein, Frank T. Piller -- Winning with the Enterprise 2.0 / Don Tapscott -- Beauty comes from within : the new culture of communication in Enterprise 2.0 / Willms Buhse -- Reality check Enterprise 2.0 : the state of play within German companies / Nicole Dufft -- SAP : building communities in the enterprise / Craig Cmehil -- Vodafone and Enterprise 2.0 / Stefan Böcking -- Nokia : Enterprise 2.0 and mobility / Stephen Johnston -- Molly's secret diary of the confessions of a social software convert / Suw Charman-Anderson -- Summary : Enterprise 2.0 : companies as social networks / Willms Buhse, Sören Stamer -- Glossary -- The authors