again, I am fascinated by lists of bests, especially as related to literature; they comprise both an ideology of the canon and a sociology of popular tastes, a la Bourdieu; in an extended form, they comprise much of amazon.com
complete book online, covers many areas often not dealt with, such as porn sites and dating sites; one insight that may draw you to read more: "the times that count in cyberspace are highly accelerated and strongly individualized."
visual anthropology open archive, photos with comments: "opportunity to examine photographic modes of communication across societies, cultures, and academic worlds"
theses for a proposed book on this topic, to which readers are invited to contribute, with comments included in "symposia" after each chapter, first announcement. Later entries include chapter contributors, topics, comments.
considering a new kind of network or network-assisted art, such as Internet or cell phone facilitated performances, on or offline; using locative media; Creative Commons, etc. An older idea was Internet Art.