Of all the "home automation" folks that I've met, I've found that most of them are big Hallowe'en enthusiasts, too. It's certainly one of my favorite holidays, and using home automation equipment for spooky purposes is a lot of fun.
I guess Smarthome has noticed the intersection of interests, too. They have a special Hallowe'en store that is stocked with several interesting items. The glowing footprints look pretty cool (and you can control them with the addition of an X10 module) and I'd like to sample a few tracks from the Haunted Circus CD.