Supersoak your pests!
Tim Higgins had a problem with "rabbits" cutting through his yard to go to the local pool. So Tim, as any good inventor would, created a solution that watered his lawn and helped keep the "rabbits" away. His solution combines phidgets, an IR camera, and x10 to control everything and I must say, it works great!
Tim was nice enough to create a version of his site just for Coding4Fun to show off some of his source code. To do the motion detection, Tim uses AForge. Tim was also nice enough to share his web service code with everyone!