We make no efforts to hide our affection for our 8x8 RGB LED Matrices (the ones we used in our LED Coffee Table). They are bright, colorful, and awesome to play around with. However, four students from Télécom ParisTech took the LED Matrix to another level with their GLiP project.
RGB LED Matrix (this one has a serial interface).
GLiP - standing for Great LED Interactive Puzzle - is an outstanding, multi-function project developed by French students Mickaël Camus, Enzo Casasola, Julie Estivie and Florent Matignon. Using SparkFun LED Matrices, they created an interactive puzzle/piece of art.
The blocks can be arranged in any order, except one block must remain in the top left corner. This is the "master block," which is connected to a computer and gives commands to the rest of the boards via infrared. 16 blocks can work together to create a 32x32 (or 168x8) puzzle, animation, or text display.
I think the video speaks for itself. To read more about this project, visit the GLiP website. Great work!