Google Image Labeler

Google Image Labeler has to be the worst thing to happen to office productivity in years.

Basically, google wants you to help them tag images. To do so, you play a game with a random, unknown partner. The two of you apply labels to images. If the two of you enter the same tag, you both get points. You try and match labels on as many images as possible in 2 minutes.

They even amp up the difficulty as you improve by making the easy tags "off-limits".

Good stuff. You quickly find yourself trying to figure out your partners head.