Google's Imagelabeler

http://images.google.com/imagelabeler/ pairs you with a stranger and has you play a game:

View the same set of images.
Provide as many labels as possible to describe each image you see.
Receive points when your label matches your partner's label. The number of points will depend on how specific your label is.
See more images until time runs out.

3D is here now!

And the code is available so you too can . . .

First, see the video at

http://andrewsullivan.theatlantic.com/the_daily_dish/2009/03/this-is-web-40.html

Then, try it yourself at

http://ge.ecomagination.com/smartgrid/#/augmented_reality