Yesterday I came across an interesting  piece on GigaOM about the "Fat Belly" (original piece linked here), that added on to Chris Anderson's Long Tail theory (read about it here). In a nutshell: Anderson's theory divides the power law distribution curve into two segments, a big head, a tall peak that represents things like top search queries, main current news issues, a blockbuster film, mass products etc... and rapidly drops and extends into a long tail, all the niche searches, stories, products, indie-music, B-movies etc... to put it simply, people search/buy/consume/are intereseted in "less of more". The GigaOM piece adds to the equation a middle bit, the fat belly, that gathers social networks, online communities, aggregators (like digg) etc...