The 20th Communities in New Media (GeNeMe) Conference presents innovative technologies and processes for the organization, cooperation, and communication in virtual communities. It is a forum for professional exchange especially in the fields of knowledge management and online learning. The conference focuses not only on technological and economic aspects of the use of new media, but takes a closer look at sociological, psychological, economic, didactic, and legal facets as well. GeNeMe is geared towards experts from research and industry. It is designed to promote practical and scholarly insights among participants from various disciplines, organizations, and institutions from academia, business and administration. [... from the introduction]