Thanks to new wireless technologies (WIFI, GPS, RFID) and mobile media, public space is subject to drastic changes. It is being traversed by electronic infrastructures and networks, and alternative cultural and social domains are evolving, though often invisible from a conventional viewpoint. The traditional physical and social conditions of the public domain are being supplanted by zones, places and subcultures that transcend the local and interlink with translocal and global processes. The question is whether there are also new opportunities for the individual and for groups to act, participate and intervene publicly in this hybrid, seemingly flexible space. How do people appropriate the new public spaces? Where does the ‘public’ take place in this day and age? Who shapes and moulds it by devising spatial, cultural and political strategies?