Do you ever do this - put down your mobile phone, and then have to use someone elses phone to ring it in order to find it again.  Well that's just one use of this new nifty little device called Nio.  The Nio is a Bluetooth security tag that makes data rich devices such as Blackberry's, laptops and data sticks hard to loose and hard to steal.  You attach a nio to your keys and activate a personalised security zone between, for example, your mobile and your tagged keys.  If you walk away from your phone, or someone steals it, then your nio tag sounds the alarm. Costs £59.95. 

Of course, I'm not sure what happens if you loose your keys!!

More details at www.bluenio.com

Here's a little demo on YouTube