General Links
DoItYourselfChristmas.com - Where the Christmas decorators dream up ideas
PlanetChristmas.com - The ultimate website about anything Christmas.
LightORama.com - The creators of Light O Rama.  The vendor of software/hardware to sequence lights.
AUSChristmasLighting.com - Australia's Christmas lighting board. Great info.
xLights/Nutcracker - Used to generate pixel patterns for our display.

Other Notable Christmas Displays
LightsOnDisplay.com - Mike Z's house lit up with amazing video sequencing in Sherman Oaks, California.