Infoshop News: Anarchist/Independent News, Opinion, Huge anarchist FAQ, online library and much, much more.
Indymedia!: Global network of local independant media/news projects!
Zine Library: Huge free online zine library! Has zines on just about everything!
Northeastern Anarchist Network (aka NEAN): A general anarchist network centered around the northeastern u.s. (duh)
Crimethinc: A group with autonomous cells all over the world. Focuses mainly on the creation and distribution of really great literature!