StickNFind: the greatest invention I've ever seen (today)

(via Boing Boing) There are 42 more days in StickNFind's IndieGoGo campaign.  Here:  Go contribute.

Not convinced?  Alright.  StickNFinds are bluetooth coin-like things that you can stick to anything you want.  Using a cellphone app, you can locate those stickers, make them beep, use a radar screen to point you towards them, and more. Here:  Go contribute.

Here's a video explaining it all:

Awesome, right?  Here's the Indiegogo link again.

My biggest question is whether you can sync multiple phones to the same sticker -- so that, for example, we could put one on my mother's phone, and make both my dad's and my phones detectors to find it.  I asked in a comment, and will report back if I find out.