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Popular social network utility Facebook has updated Lexicon, the tool for marketers and advertisers to monitor what users are saying about topics or products. It now scans the publicly available updates made by users, such as posts to each other's "Walls," and now the new Sentiment feature produces visual displays of related terms — the better to position your brand and spin discontent by buying ads targeted to the very keywords Facebook users are typing into their profiles.While it won't identify individual users directly, indirectly it will allow advertisers to reach a class of individual users through more refined placement. Which is kind of the same difference — mention American Apparel, and more porny ads for you!