Many AI problems involve tedious components. There are libraries of knowledge to be compiled, corpuses to be tagged, long training sessions with learning machines, and so forth. Such resources are critical to our success, but building them can be dull and time-consuming. What if we could subcontract most of that work out to thousands of volunteers on the internet?
There are many challenges in turning to the general public for help. We cannot expect them to take the time to learn formal languages or understand how to program or debug complex systems. Our systems need to interact with users in familiar languages, decompose hard problems into "bite-sized" chunks that the average person could solve quickly, and be fun and engaging to attract enough volunteers.
One side effect of this approach will be to bring AI out of the laboratory and into the everyday world, familiarizing the general public with the work that we are doing, and perhaps in the long run help build public support for our research.