Micah Sifry posted links on 19 January to 2 excellent articles about the "New New Left," its relationship with the Internet, and how it compares to the "Old New Left" of the 1960's and 70's:
Start with Matt Stoller's brave effort at a comprehensive explanation of the rise of the net-roots entitled "What is this New Movement?", and then turn to Mark Schmitt's amplifications and clarifications.
These two articles are a must-read for activists, anybody interested in the the relationship between technology and social change, and anybody who wishes to understand the MoveOn-phenomenon and the context for new, up-and-coming groups like Avaaz.org, who want to make the MoveOn organizing model global.