Electronic Frontier Foundation

http://www.eff.org

The most vocal (and famous) champions of free speech and privacy on the Net. The EFF is the Net's most effective lobby on Capitol Hill…a place where a Net presence is sorely needed these days. Most of the idiots in Congress still think they can regulate the entire Net, as if it's all a part of the United States. Welcome to the future, guys! The Net IS the Global Village!

(See also: Tor, the EFF's latest project to promote online privacy and anonymity.)