Great listings here

Amazon Basin Delegations Intern
Amazon Alliance for Indigenous and Traditional Peoples of the Amazon Basin
http://www.idealist.org/match/358265280-240
Washington, District of Columbia, United States

The Global Fund for Children - Undergraduate Internship Fall 2007-Spring 2008
Strategies for Growth
http://www.idealist.org/match/358294463-281
Washington, District of Columbia, United States

Library Intern
Resources for the Future (RFF)
http://www.idealist.org/match/358299695-185
Washington, District of Columbia, United States

Fundraising and Development Internship
Government Accountability Project
http://www.idealist.org/match/358322543-278
Washington, District of Columbia, United States

Earth Trends Fall/Winter Internship
World Resources Institute
http://www.idealist.org/match/358348139-317
Washington, District of Columbia, United States