I happened to see this Google Image Labeler, which is a "game" made by Google. Users will be paired and will be asked to label the images. The users can be guest or google user. We will be given sometime and a random picture. The user and the partner will be asked to give as many labels as possible for that image. When the users label matches the label of the partner both will earn points and will move one to the next image.
Well, this game is not only for fun, this will ensure Google that the keywords are matching the correct images. Thus it will help Google to make its Image search more efficient. Google is so clever
