Impressive story, despite the Django and EC2 plugs.<p>Of course this suggests a start-up project: a business service that does crowdsourcing. The service would be customized for one task and would have various forms of cheat detection (e.g., CAPTCHAs, user profiling, meta-moderation and maybe some secret sauce).<p>Mechanical Turk is fine in many cases, but this story shows sometimes it's better to roll your own (or have somebody else roll it for you).