In the Netherlands, AED mapping has been crowdsourced so as to save patients that might need them urgently. A project is called to do that on a worldwide basis. Watch this TED video
The crowd is taking emergency intervention in their hands.
The other side of the video about taking your blood pressure, hopping on the scale… and there goes your latest health parameter on the web… to your doctor, to your social network. Are you ready to go that far?