This lighting display, synchronized to music, has been making the rounds. Some people questioned its veracity; but as Snopes.com documents, it's for real:
This display was the work of Carson Williams, a Mason, Ohio, electrical engineer who spent about three hours sequencing the 88 Light-O-Rama channels that controlled the 16,000 Christmas lights in his annual holiday lighting spectacular (from Christmas 2004). His 2005 display includes over 25,000 lights that he spent nearly two months and $10,000 to hook up. So that the Williams' neighbors aren't disturbed by constant noise, viewers driving by the house are informed by signs to tune in to a signal broadcast over a low-power FM radio station to hear the musical accompaniment.
He explains how he did it (using free and demo software) here.
Here's the same house, set up for different music.
And here's another one that I think is the best of the bunch. No information on where it is, or who built it.