OMG, I need this for everything.

This is ridiculously useful.  I'm a genius, so most of my time is spent being a genius, which means that I don't have time to remember things like where I dropped my keys, or where I put my wallet.  So, being able to whip out my phone (assuming that with my vast intellect, I have managed to hold onto the only tether to the real world) and find all of my other non-electronic devices (as long as they aren't shrouded in the appropriately sized Faraday cage) is a miracle that I, of course, thought of long ago.  Thankfully, someone else actually put in the time and effort to put together a very cool little device that does this; I'm glad my idea totally came to fruition.

http://www.indiegogo.com/sticknfind