Andrea tipped me on this bookcase (they look like billies) modified to have 96 channels of DMX controlling many tiny red, green, blue LEDs. Click to play the video. Impressive effect.
Update!
After posting this, Timothy, the creator of this LED bookcase contacted me with details of his hack. Click here for a downloadable pdf to make your own DMX controlled LED bookcase. Also see his other LED creations on youtube.