There is also Tile (http://www.thetileapp.com/ http://www.thetileapp.com/) which is using them as a way of distributing the finding of lost things. It's an inte

There is also Tile (http://www.thetileapp.com/ http://www.thetileapp.com/) which is using them as a way of distributing the finding of lost things. It's an interesting concept, but something I'd never do.