The project adopts a social media structure that invites users, upon entering the site, to summarise their vision for changing the world. The site then instantly displays a range of suggested “action platforms”- similar visions already instigated by other users- which are conveniently broken down into “micro-actions”- 132-character propositions reminiscent of Tweets- that would assist this vision. The user can elect to take on a micro-action and complete one, or alternatively can plug in his or her own micro-action and distribute it to other like-minded users for completion.

I’ve thought of similar ideas.  The above article was written December 2011, and I’ve never heard of this website until now.  After briefly looking at the website, it’s still active even in the past few days, though I’m not sure how much.