Perhaps a small gift from you could make a difference on GlobalGiving and qualify you for a match from your family foundation. This article highlights GlobalGiving's commitment to earth-friendly projects.
Here is information on Firstgiving, another site for small-scale philanthropy. This site lets people raise funds for any U.S. non-profit organization by providing a free page to send to friends and family to ask for donations to support an individual's fundraising efforts. Check out this interview between the CEO of Firstgiving and a user of the site:
