How listening to the world will change the world

So you must've heard about ''the pulse of the nation'', a twitter-enabled study of the US population mood throughout the day of which the video below is a worthy representation with green for good mood and red for bad mood [youtube=http://www.youtube.com/watch?v=ujcrJZRSGkg]

Now, however, and in what I'd consider to be a breakthrough in the field, three economists (or might I say, nano-economists) have established a link between the twitter-inferred mood an the stock market. Here goes an incredible link.