I started my site and its collection of resources last summer in response to the invasion of Iraq. I began with the soldiers and slowly moved into open activism on the site against the war. The links are for returning soldiers, but they are relevant for all of our activism.
Couple more that I added as I got more fed up with Bush's aggression:
Peace and Justice:
http://www.returningsoldiers.us/peace_and_justice.htmHuman Rights/Civil Liberties:
http://www.returningsoldiers.us/human_rights_and_civil_liberties.htmTons of links there. Cheers!