UGrokIt uses RFID technology to tag your devices so in theory it makes them harder to lose. Never underestimate the power of misplacing, however, at least in my experience. It can't hurt, though, and I'm pretty sure it would help. The planned system includes an RFID scanner, which connects to a smart phone (see, here's the drawback to it for me...you need to have your phone), along with RFID tags that can be attached to your gadgets. The tags are machine washable and can be attached or stuck to just about anything you'd rather not lose.
The tags will be pretty cheap, only about $1.00 US each, but the entire system will run you about $159.00 US. A release date has yet to be announced, but keep an eye out...it'll be along soon enough.