Forget IP-over-carrier-pigeon — check out this art-project to run IP over running water:
1. The set-up at the top of the stairwell consists of a computer with a flat panel LCD screen and a USB video camera. When someone walks up to the screen they see live video of themselves. There is a button in front of the screen that when pressed takes a picture of the person. The picture is then translated into a 16 x 16 pixel grayscale image (desktop icon size) and displayed on the LCD.
Also upstairs is a water valve attached to a fixed jug of water or connection to a water source/main. When the grayscale image is created, the computer then analyzes the color of each pixel and 'prints' out pulses to the electronically controlled water valve – a different pulse pattern depending on the color of the pixel on screen. The water then falls to the first floor.
2. The set-up on the first floor consists of a plexi-glass tray that awaits the falling water drops. The tray will sit on top of a custom built wooden box with a video projector inside. A funnel situated above an infrared switch watches for falling drops and through a microcontroller, feeds information to the computer at the bottom to decode which color pixel has been printed.
(Thanks, Jed!)
