Post links to English-language image boards here. To start off, here are the usual suspects:

http://www.iichan.net/ - DEAD DEAD DEAD
http://www.4chan.org/ - The original English-language board.
http://www.0chan.net/w/ - The Switzerland of image boards.
http://www.5chan.net/ - lol furries

Post more, unless they prefer to stay secret.