Google have created a new online game called Google Imager. This game pits you against another random contestant giving images keywords. Its a good game, quick to play and rewarding, tho i suspect many other people playing are a little slow witted as they take AGES to add in their terms and pass on some really easy images without trying.
Why would Google invest the time, bandwidth and money in such a game? I think they’re experimenting with tag clouds and meta data for their Google image search which currently relies heavily on alt tags for representation. Keep your eyes peeled for developments in Google images, Picassa and other maybe new products?