Has anyone wired up their doorbell so it flashes a light in your HT while you're blaring the music or movies? I currently have a flashing light that will alert me that the telephone is ringing. I love it. There should be something similar for doorbells hadn't there? Anyone done this in their theater? I know where my doorbell unit is, and should be able to run some kind of low-voltage wire into the theater with no troubles. But where can I get a doorbell light and what kind do I get? Radio Shack?