Application of Human computation/Crowdsourcing

Look around, ask around, explore to discover interesting practical
applications/tasks to which human computation/crowdsourcing could
apply and offer unique advantages. Write down your idea in 1-2 pages,
describing the application/task, current methodology (if any), a
proposed solution using human computation/crowdsourcing, and the
benefits it can provide. Describe your "crowd": is it the general
populace or some particular section? What would be its incentive to
participate in the proposed exercise? Upon what assumptions (if any)
do your outcomes depend? Draw comparisons with related efforts (if
any).