The blog Let Freedom Ring is covering what it terms the censorship cabal - a group of interest groups like Daily Kos, MoveOn, and the Campaign for America's Future, preparing to attempt to pressure sponsors out of advertising on Fox News Channel with threats of boycotts. Checking out who is involved with these groups, it draws the conclusion that:

The people who are trying to intimidate businesses that advertise on FNC are connected with K Street lobbyists, major political strategists in the Democratic Party, major anti-war groups and an organization that's been charged with voter fraud operations across the country.