Nerval's Lobster writes: "Software developer Jeff Cogswell is back with an extensive under-the-hood breakdown of Facebook's Graph Search, trying to see if peoples' privacy concerns about the social network's search engine are entirely justified. His conclusion? "Some of the news articles I’ve read talk about how Graph Search will start small and slowly grow as it accumulates more information. This is wrong—Graph Search has been accumulating information since the day Facebook opened and the first connections were made in the internal graph structure," he writes. "People were nervous about Google storing their history, but it pales in comparison to the information Facebook already has on you, me, and roughly a billion other people." There's much more at the link, including a handy breakdown of graph theory."