Collaborative Work, Communication and Knowledge Management in Theory and Practice SOSOFT 09 Interdisciplinary Workshop of the Heinrich-Heine-University Department of Information Science & Department for English Language and Linguistics http://www.phil-fak.uni-duesseldorf.de/social-software Düsseldorf, Germany September 28 th and 29 th , 2009 Edited by Isabella Peters, Cornelius Puschmann, Violeta Trkulja & Katrin Weller © 2010 for the individual papers by the papers' authors. Copying permitted for private and academic purposes. This volume is published and copyrighted by its editors.