In recent years, social software in the enterprise has been increasingly discussed and as of 2006 the term Enterprise 2.0 has been increasingly used. The present work explores the origins of these concepts, connects to other scientific disciplines and analyses future possibilities. The book consists of a theoretical and a practical part. The theoretical part introduces both the current trends with respect to Enterprise 2.0 and the underlying technologies. Furthermore some case studies and usability issues are discussed. Since social networks gain in importance, the OpenSocial API is studied in the practical part. To determine whether OpenSocial is a suitable solution for enterprise-specific problems, a simple application, namely Social Conference Manager, has been implemented. Based on the lessons learned, some new requirements are formulated. Finally, the question of whether OpenSocial is suitable for use in the enterprise is answered, and also the future prospects are shown. Overall, the current approaches are promising from a technological point of view; however, they cannot be used successfully without a reformed business culture and without an enhanced security.