We've had a string of car robberies in our neighborhood over the past week. The burglars are basically going around and looking for cars that are unlocked and taking things. I'm thinking this might be a great opportunity for a project. One thought I have is to put some kind of sensor on the door, then when it is opened trigger my camera to take a picture (my camera would be inside, so I'd have a second Arduino or remove shutter release to get a signal, not sure yet).
Another thought is to use the distance sensor/ethernet shield to alert me on my computer the moment the door is open.
Anyway, I'm looking for good suggestions and ideas.