Data handshake
This article about data transmission using skin resistance makes my mind wander. Sex encounters? We signal our willingness, and brush the other person - a match will blink in our phones. A convention - handshake, and my info, blog and picture are transmitted to your iPaq. A kid at school delivers notes to their parents via a touch of the skin. A kid at a playground has only their friends as approved playmates - anything else triggers an alarm. A wife knows if her husband has been flirting :).
But didn't microsoft just patented something similar to this?
via boingboing