SINTELNET is a Coordination Action whose aim is to explore the interplay of future and emerging information technologies and the development of Philosophy, Humanities and the Social Sciences. Advances in science and IT are rapidly creating and sustaining new forms of perception, communication and social interaction. The traditional distinctions between the natural, the social and the artificial are becoming more and more blurred as radically new kinds of social environments are being formed, including social networks, virtual realities, robot societies and systems based on software agents. These changes create a need to re-explore some of the basic concepts of Philosophy and Social Science, including existence, personal identity, meaning, knowledge, action, norms, conventions, rationality and governance. The aim of SINTELNET is to enhance the bi-directional interaction between humanities and emerging information technologies and develop new approaches to understand and develop future IT and Society. This will involve both adapting and applying traditional concepts to new, IT-enabled domains, as well as using these domains as a basis for the critical re-examination of those basic concepts.SINTELNET stimulates debate and coordinates scientific research by organising a series of inter-disciplinary, thematic workshops that bring together key players in diverse, relevant sub-areas. It hosts Working Groups in these sub-areas who will deliver studies and position papers as well as identify emerging topics and important research challenges. The Action addresses specific needs by working closely with external stakeholders to identify topics for meetings and workshops. It can assist in creating guidelines and policy documents. Besides documents and other materials emerging from working groups and workshops, the SINTELNET Web site acts an as information source for researchers, developers, stakeholders, end-users and the general public.