-Yvette J. Alberdingk Thijm
executive director
Witness [3]

A member of Witness's board of directors since 2005, Alberdingk Thijm joined the nonprofit human-rights video community full time in 2008.

-Dana Bourland
senior director
Enterprise Community Partners' Green Communities [4]

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.

-Beth Kanter
consultant
BethKanter.org [5]

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.

-Darlene Liebman
cofounder
Howcast Media [6]

In partnership with Facebook, Google, YouTube, and others, Liebman's Howcast teaches people worldwide to use the social Web to organize grassroots political movements.

-Ellen Miller
cofounder and executive director
Sunlight Foundation [7]

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.

[8] The Executives [8]	[9] The Entrepreneurs [9]	[10] The Gamers [10]
[11] The Evangelists [11]	[12] The Activists [12]	[13] The Bloggers [13]
[14] The Brainiacs [14]