The Onion has some great videos for the Games, including their report about the selection of U.K. children to balance apples on their heads for the archery competition. They also posted some outstanding Olympic info-graphics.
An array of Olympic cartoons are available here. I wish there was a site for "Learn To Speak Cat" cartoonist Anthony Smith, whose series of Olympic cat cartoons in the METRO newspaper is quite good.
Images via The Onion and the provided links