Magnetic Implant
Even so this has been all over the place I still would like to share that very interesting body modification. What they do is implant a rare-earth magnet into your finger tip and all of the sudden you can feel electricity or when your harddrive is spinning up. Not for the soft spirited souls as it is dangerous as any "art" implant. The story writers implant got infected and when trying to remove it at a professional doctor it broke in pieces and was lost inside the finger - after a while it reassembled (as magnets tend to do) inside the finger and the ferro-magnetic sense is back. Read more at wired.