Because the Optimus Maximus keyboard continues to be a vaporware (They're supposedly to release it in March 2007!), here's something else from Korea: a keyboard with programmable LED lighting system!
A software that lets you customize the way the LEDs behave is also included. You can make the keys glow only when your hit them, create your own patterns, or simply set it to glow in one single color of your choice.
Link (with video demonstration)
You can check there if it finally becomes a real product...