The Snapshot Serengeti project is trying to do something along the lines of NASA Clickworkers: to use groups of amateurs to "identify the thousands of animal photographs collected from 225 motion-activated cameras in the nature preserve": http://connect.dpreview.com/post/3745415348/sanpshot-serenge...

It's a lot of fun and it feels great to contribute to a noble project. Plus it's surprisingly addictive: http://www.snapshotserengeti.org/