In this video they demo a flat array of LEDs (called a flexgrid) which works like a low resolution display. Each LED in the matrix has a plastic or glass box around it and can be individually switched on and off. The whole display can be bent into a tube shape and controlled via computer (I assume). In the video the guy bends it around in the dark as it flashs various patterns over it's surface. It would probably work pretty good as one of those scrolling word signs too. The original post about this bendable LED display mentioned it's possible use in clothing. How about LED display doormats?