Fourth International Conference on Communities and Technologies June 25-27, 2009, on the campus of the Pennsylvania State University Paper submission deadline: December 15, 2008 http://cct2009.ist.psu.edu/ <http://cct2009.ist.psu.edu/> The Communities and Technologies biennial international conference serves as a forum for stimulating and disseminating research on the complex connections between communities - both physical and virtual - and information and communication technologies. Researchers studying aspects of the interaction between communities and technologies from any disciplinary perspective are invited to participate. Sponsored by Microsoft Research and Penn State's College of Information Sciences and Technology. In cooperation with the Association for Computing Machinery (ACM SIGCHI and SIGCAS). Proceedings will be published in the ACM Digital Library. Information technology is not just for people who bowl alone!