A good source for RF products — would be great to move to all wireless control at the house.
Lots of good discussion on the MOM site about servo control software. Robo-Ware Robotics Servo Control Software is recommended, supports downloads to basic stamps. Visual Servo Automation – Overview – The Solution for Mini-SSC Servo Control Software gets a lot of recommendations too but no download to basic stamps, you need to keep the PC in the picture.
Now here are some great one-off controllers and effects — inexpensive, fixed purpose, but do it well and cheaply — Halloween electronic products from Haunt Master Products, Inc.. Also MAGIC GADGETS HOME PAGE. and Cowlacious Designs Halloween Products & Pages. and Scream In The Dark props and electronic effects. Source for various kits — electronic kits, robot, fm transmitter, electronic circuit, ham radio Simple IR controlled power strips — All Electronics Corp.
OK I don’t really find X10 to be that appropriate for haunt automation. Too much latency in the gear, and too unreliable a protocol. The latency is the big problem. That said, there is a lot of product available and it is relatively inexpensive. You can find x10 and also higher end home automation here — ASIhome. Also All things x10 here — SMARTHOME.COM