What is “Web 2.0”? This paper presents an analysis of the structural, technological and functional innovations that jointly form Web 2.0. It catalogues the differences from Web 1.0 and presents a number ofchallenges for future research.

The productivity of information workers is jeopardized by too much e–mail. This paper proposes the use of a scarce synthetic currency that senders can use to signal the importance of information and receivers can use to prioritize messages.

This paper takes a new look at the debate over commons and property in information and communications. It warns against recreating the old communist–capitalist ideological divide by framing the movement for informational commons as “info–communist.”

This special issue, edited by Michael Zimmer of the Information Society Project at the Yale Law School, exposes, explores, and explains the ideological meanings as well as the social, political, and ethical implications of Web 2.0.