www.theonion.com Chances are you already know what a great website this one is.
www.satirewire.com A great place to go for your daily humor fix.
www.somethingawful.com DO NOT MISS Photoshop Friday's Parade of Robots (04.25.03).
www.humorix.org All Linux Humor. All Copied Mottos. All the Time. Need we say more?
www.madblast.com Warning: This site includes some sophomoric humor (i.e. bathroom jokes), but we can't help laughing.