I'm not really a political animal, though I'd like to get involved more. Check out my comments on "loyalty".
For:
1. Gay and lesbian rights
2. Removing religion
Women's rights
Equal rights for minorities
Public education
Social welfare
Abortion choice
Free speech
Feminism
Single-payer healthcare
Immigration
"Right-to-die" laws
GMOs and genetic engineering
Paying down the deficit
Cheap housing for the poor
Teaching evolution in schools (and science in general)
Giving more power to the USDA to regulate slaughterhouses
Transgender issues
Legalizing marijuana
Prison system reform
Against:
School vouchers
The "poverty industry" (check cashing, rent-to-own, cheap credit
schemes, etc.)
Insurance companies
Pseudo-science
Alternative medicine
Military spending
The flat tax
"State's rights"
Mother Theresa
Religion
Ambivalent:
Guns
The free market and other libertarian issues
Animal rights
Vegetarianism
Social security
The death penalty
"English only" education
Legalizing other drugs besides marijuana
Crime
Global Warming
Here are some liberal resources and links:
Alliance for Democracy
http://afd.online.org
Campaign for America's Future
http://www.ourfuture.org
Center on Budget and Policy Priorities
http://www.cbpp.org
Center for Community Change
http://www.communitychange.org
Center for Public Integrity
http://www.publicintegrity.org
Center for Responsive Politics
http://www.opensecrets.org
Center for Study of Responsive Law
http://www.essential.org
Citizens for Tax Justice
http://www.ctj.org
Common Cause
http://www.commoncause.org
Economic Policy Institute
http://www.epinet.org
Environmental Defense
http://www.environmentaldefense.org
Fairness and Accuracy in Reporting (FAIR)
http://www.fair.org
Farm Aid
http://www.farmaid.org
Financial Markets Center
http://www.fmcenter.org
Global Exchange
http://www.globalexchange.org
Global Trade Watch
http://www.citizen.org
Independent Media Institute
http://www.alternet.org
Institute for Agriculture and Trade Policy
http://www.iatp.org
Institute of Policy Studies
http://www.ips-dc.org
The International Law Project for Human, Ecological, and Environmental
Defense (HEED)
http://www.heed.net
Jobs With Justice
http://www.jwj.org
National Farmer's Union
http://www.nfu.org
National Labor Committee
http://www.nlcnet.org
National Low Income Housing
http://www.nlihc.org
National Priorities Project
http://www.natprior.org
New England Burma Roundtable Trillium Asset Management
http://www.trilliuminvest.com
The Preamble Center for Public Policy
http://www.preamble.org
The Program On Corporations, Law, and Democracy (POCLAD)
http://www.poclad.org
Public Campaign
http://www.publiccampaign.org
Public Citizen
http://www.citizen.org
Rocky Mountain Media Watch
http://www.bigmedia.org
Sustainable Energy and Economic Development (SEED) Coalition
http://www.seedcoalition.org
TomPaine.com
http://www.tompaine.com
United for a Fair Economy
http://www.stw.org
United Students Against Sweatshops
http://www.usanet.org
US Public Interest Research Group (PIRG)
http://www.pirg.org