Battling Corporate Personhood:
Reclaim Democracy: http://reclaimdemocracy.org
Center for Democracy and the Constitution: http://constitution411.org/ (based in Lexington!)
Program on Corporations, Law & Democracy: http://www.poclad.org
Multinational Monitor: http://www.multinationalmonitor.org
Corporate Crime Reporter: http://www.corporatecrimereporter.com
Adbusters: http://adbusters.org
Background reading: http://www.uua.org/world/2003/03/

Energy Independence:
Apollo Alliance: http://www.apolloalliance.org/

Hunger:
Oxfam: http://www.oxfamamerica.org/

Fucked up Jewelry Industry:
No Dirty Gold: http://www.nodirtygold.org/home.cfm

GLBT Rights
Human Rights Campaign: http://www.hrc.org/
Freedome to Marry Coalition of MA: http://www.equalmarriage.org/

Human Rights:
Amnest International: http://www.amnesty.org or http://www.amnestyusa.org

Honest Science
http://www.fas.org (Federation of American Scientists)

Progressive Foundations and Institutes:
http://rockridgeinstitute.org
http://www.pewandgatesforpeace.org/ (Help convince the Bill&Melinda Gates foundation to send every high school kid to a third world country for six weeks)