There's a series on Tech TV called Nerd Nation and tonight was a feature on Hactivism, or activism online. Most of the show was focused on online protesting of the FTAA conference in Quebec. I've included some links from the show which I found interesting. They are listed in order of how much I looked at them. Definitely check etoy.com, it's hilarious as well as informative. As always....form your own opinion.

Electrohippie Collective
Hactivist.com
eToy Corporation-Must read
On electronic civil disobedience
Electronic Disturbance Theater
Tao Collective-Hacktivism
Zapatistas in Cyberspace
Electronic Civil Disobedience