Wow. But, I was hoping this would occur _after_ my lifetime. Excellent feat, but it's now quaint how the obvious future use (wholesale surveillance) isn't listed as an application. They always state a motive of searching for children and assisting the elderly. I don't want to doubt anyone's sincere desire to produce helpful technology; but, in these cases, it's irresponsible to sidestep such an important issue.<p><a href="http://en.wikipedia.org/wiki/Rover_%28The_Prisoner%29" rel="nofollow">http://en.wikipedia.org/wiki/Rover_%28The_Prisoner%29</a>