-Yvette J. Alberdingk Thijm
A member of Witness's board of directors since 2005, Alberdingk Thijm joined the nonprofit human-rights video community full time in 2008.
Enterprise Community Partners' Green Communities 
Bourland's carbon-offset fund backs design and construction choices that yield the cleanest, most energy-efficient houses. It raises money for affordable homes and saves the environment in the process.
The master of social-media fund-raising, Kanter (who shares her techniques widely) recently brought in $200,000 for Cambodian orphans using Twitter and other social-media tools.
Howcast Media 
In partnership with Facebook, Google, YouTube, and others, Liebman's Howcast teaches people worldwide to use the social Web to organize grassroots political movements.
cofounder and executive director
Sunlight Foundation 
Nobody has done more than Miller to use technology to bring transparency to Washington. For three years, her foundation has been churning out Web sites, databases, and online tools that open congressional doings to common folk.
The Executives 
The Entrepreneurs 
The Gamers 
The Evangelists 
The Activists 
The Brainiacs