Geek Points: 900
The BiKN is a tracking system for your iPhone 4/4S that locates lost items. Attach a tag to anything you often lose (keys, wallet, dog) and use Apple's smartphone to get a lock on its whereabouts. There's also a Leash Mode that alerts you when whatever you've attached one of the sensors to has wandered past its limits. Do what that what you will. We're not here to judge.