In the 1970's, the BBC came up with the genius idea of transmitting breaking news and rudimentary graphics to TV sets via text encoded in the folds of a normal analog signal. Many TVs in Europe and some in the US are equipped with a decoder, allowing them to pick up the so-called teletext feed. A typical teletext screenshot is on the left, but you can check out more on this site.
Ok, if I almost lost you there with geek hooey, allow me to wow you with pretty pictures in this online gallery of uber-pixelated, retro-happy submissions to the latest teletext art contest. via Video Thing