AMP: Artists' Meeting Place and Resource Collective

Guerrilla Girls
http://www.guerrillagirls.com
"A bunch of anonymous females who take the names of dead women artists as pseudonyms and appear in public wearing gorilla masks. [They] have produced posters, stickers, books, printed projects, and actions that expose sexism and racism in politics, the art world, film and the culture at large. [They] use humor to convey information, provoke discussion, and show that feminists can be funny. [They] wear gorilla masks to focus on the issues rather than [their] personalities."