I think this is a really impressive use of Google Earth and the internet (centred around Amazon's "turk" technology); a massive distributed effort using recent satellite images on both Amazon and linked to Google Earth to find the missing explorer, Steve Fossett.
Basically you log into Amazon using your normal book buying username and password and select which Turk you want to do - the Steve Fossett one is free, but many others you can get paid for. Then you are presented with an example image and the image Amazon want you to check. You simply select "yes" (there is something interesting) or "no" (move along, nothing to see here).
Go to Amazon's Mechanical Turk (www.mturk.com)
Original article on BBC News