Interesting Mechanical Turk questions and surveys.

From Russ Hammond

If you had an unlimited budget, what are some interesting crowdsourcing questions you would post on Mechanical Turk?

I like this one : I would pay the workers to ask their neighbor about a (small?) problem the worker can solve, and pay the worker to solve it. And then see what was the problem, and how it was fixed.

If one could observe all transactions on the Amazon Mechanical Turk marketplace, what would would be some of the most interesting things to know?