Google's image labeler launches This is a pretty creative way to help improve a search index. In this case, Google is aiming to improve the relevance of their image search index by basically using their fans. Here's their description:

How does it work?
You'll be randomly paired with a partner who's online and using the feature. Over a 90-second period, you and your partner will be shown the same set of images and asked to provide as many labels as possible to describe each image you see. When your label matches your partner's label, you'll earn some points and move on to the next image until time runs out. After time expires, you can explore the images you've seen and the websites where those images were found. And we'll show you the points you've earned throughout the session.

I tried it and it's pretty fun. The random partner I got match up on my fifth go roung or so was right there with me. We matched 4 labels, giving me 400 points. Boo ya.  ¶ 7:19 PM