Here are some resources for social change, social venture philanthropy, socially responsible investing, giving circles, and donor advised funds as well as other useful links.

Social Change Philanthropy: Bridging the gap between the wealthy and grassroots organizations, seeks to eliminate poverty, violence, discrimination, and oppression.
Green Money Journal: Social Change
Resource Generation: Social Change
Funding Exchange: Vision
Changemakers.org

Social Venture Philanthropy:
SVP in Seattle
Silicon Valley Social Venture
Boston SVP

Socially Responsible Investing:
SocialInvest.org
SocialFunds.com
GreenMoneyJournal.com
explained at: FirstAffrimative.com

Giving Circles:
Giving Networks
PhilanthropyNW.org

Donor Advised Funds: a checking account for giving placed at a community foundation, foundation, or financial institution. Give a large sum or annual sums then distribute, per the agreement with the hosting organization, to other causes.
Defined here at investopedia and available at places such as:
Foundationincubator.org
Tides Foundation

Other Useful Resources:
Third Wave Foundation (for young women)
Resource Generation (for community, education, and collaboration)
Yes magazine (for creating a more just, sustainable, and compassionate world)
No More Prisons (for William Upski Wimsatt)
Tides Foundation--Making Money Make Change (for making money make change retreat)
Resource Generation--Making Money Make Change (for making money make change retreat)

About wealth and wealth disparity Lcurve.org
Inequality.org
Taxfoundation.org

Looking into charities
www.guidestar.org
www.idealist.org

Defining your philanthropic passions and focus
www.josseybass.com/go/inspiredphilanthropy

Membership/discussion groups for new philanthropists
www.morethanmoney.org
www.newtithing.org

Journals and newsletters
www.chronicleofphilanthropy.com
www.ncrp.org

Research and trends in philanthropy
www.aafrc.org
www.philanthropy.iupui.edu

Young people and philanthropy
www.resourcegeneration.org
www.learningtogive.org

Giving for social change
www.changemakers.org
www.wfnet.org
www.lgbtfunders.org
www.adventurephilanthropy.net

International causes
www.internationaldonors.org
www.philanthropyforum.org

Charitable planning and giving vehicles
www.givingnetwork.org/optionspage.html
www.leavealegacy.org

Financial planning, investing, and taxes
www.morningstar.com
www.irs.gov

Financial/legal advisors trained in charitable giving
www.napp.net

If you're setting up a private foundation
www.smallfoundations.org
www.ncfp.org

Find a coach
www.coachvillereferral.com
www.coachfederation.org/aboutcoaching/findacoach.asp