Independent curator, critic and writer concerned with issues of photographic history, representation, and technology. He lectures internationally about the social impact of digital media and the transformation of representation and communication in interactive and networked environments. He co-organized the international symposium Ideologies of Technology at the Dia Center of the Arts (and co-edited the book available from Bay Press: Culture on the Brink: Ideologies of Technology) and co-curated the exhibition Iterations: The New Image at the International Center of Photography and edited the book published by MIT Press. As a theorist of contemporary media, he has curated exhibitions and has contributed extensively to numerous publications, including San Francisco Camerawork, Afterimage and Views. He is American Editor of Ten.8 and Perspektief, a founding member of MergedMedia (a collective for new media), and co-founder of Critical Press, publishing monographs on issues technology and identity in postmodern culture. He is currently writing a study of the relationships between technology and photography called Photography, Technology and Representation (forthcoming from Manchester University Press), editing Electronic Culture collecting essays on the social impact of digital technology, and working in curatorial collaboratives for exhibitions in Austria (Technical Visions), Germany (Photography After Photography), Great Britain (Digital Diaspora), Luxembourg (Telepolis), and the US (The Interactive Media Festival).
- editor, with Gretchen Bender, Culture on the Brink: Ideologies of Technology, Seattle: Bay Press, 1994, 361 pp.
- editor, Electronic Culture: Technology and Visual Representation, New York: Aperture, 1996, 447 pp.
- editor, Ars Electronica: Facing the Future: A Survey of Two Decades, MIT Press, 1999, 449 pp.