Researchers from MIT put tracking devices on random pieces of trash from people in Seattle and are going to track the route it takes. So far they've attached the devices onto the "trash" (can of beans and a small light bulb along with other things) and have sent them off. They plan on showing the route in real time online and present it in exhibitions. A god way to make people more aware of they've impact on the earth through their trash!
Sounds like ADP related stuff.