While none of us are in the CIA, FBI or NSA (or will ever admit we are, wink wink), with the new Visidon AppLock (and an Android phone), we can at least pretend to be.
Visidon is Gizmodo's App of the Day today. Not only does unlocking your Android apps using facial recognition make you feel important, but it also acts as a security mechanism to avoid having other people open apps on your smartphone (only Android at this point, though).
And while it can't be used to unlock the entire phone (those days should be numbered soon), nor is it as accurate as other recognition technologies out there, this does stop friends from writing an embarrassing text message or Facebook status or judging you by the music library you carry around on your phone.
Definitely a conversation starter at a crowded bar. Although, then you'd be the guy who is at a crowded bar on his cellphone.