Want to work for Google, or at least help in their massive effort to index the web? Google has a program where people like you and me, people who idle cycles, can participate in blind image tagging. It's called the Google Image Labeler. I put a half hour in this evening. I managed to tag match six photos. Woohoo!
Of course, in the back of my mind I'm thinking that Google is selling my service to some poor sap who needs to index his image collection. I could happen you know.