Google Image Labeler
James Kellerman
Google has launched its first crowd-sourcing tool, don't you just love these new words. It uses lots of people in a game like application to help add keywords to images from the google database.
When you enter the site, google picks a partner for you and shows you an image, that picture is displayed until you both type the same label, then you are presented with a new image and so on and so forth, it is curiously addictive, and I can see them accumulating a lot of data very quickly.
http://images.google.com/imagelabeler/