Amazon has begun a service called the Mechanical Turk. What is a mechanical turk you may ask? See an answer here.

Many problems that seem easy for humans to solve are sometimes extremely costly in terms of computing time or even worse difficult or impossible to solve, such as transcription of audio or translation of text. Sure, those tasks can be done automatically at the moment but usually with a high error rate, especially if the software hasn't been “trained” first. Amazon is taking a different approach by paying you to solve these problems that are easy to solve. For example, Amazon offers you 2 cents for identifying the artist or band name from an album cover image. It's easy, mostly. You can convert the earnings into a deposit or Amazon.com store credit.

Link. Thanks, Russ!