its funny your working on this, as i have been trying to do something simaler. with zaps idea but in reverse like he posted here. hat being having them lit all the time and then fade back on. however i was hoping to use a grid of EL sheets for the keys for more control of the light dispersal. because LEDs light up anything around them and EL lights basicaly only itself. well i wish you luck on your project. im still designing a control for the EL fading and key interface.