Over the years, we've been really interested in various platforms for engaging folks to participate in all sorts of projects. We've pointed out cool prize contests such as the Netflix Prize
, and generally, when there's a really interesting concept that seems to catch on, there are plenty of copycats ready to try their hand at reproducing success. Here are a bunch of open innovation marketplaces that have the same basic idea -- and there are plenty others -- but we're still waiting on one player to really stand out.
By the way, StumbleUpon can recommend some good Techdirt