That's exactly what I'm doing in my cab. I picked up some ELWire, and designed (with some help from my electrical engineer dad) a circuit using optoisolators to switch the 90v AC that the EL Wire requires via the standard 5v signals from an LEDWiz.
Works great, though in restrospect, I think it would have been slightly easier to use solid state relays, I just didn't know they existed till later.
At any rate, they're single color, but with the LED wiz, you can fade them, blink em, etc just like a normal LED.