The intellectual property of reputation management vendor Opinity (an "ahead of times" startup which ran out of money in 2007) has been acquired by Purewire. Opinity verifies personal profiles on social networks such as Facebook. It allows other users to post feedback about the credibility of a person's online identity. Purewire's Web Security-as-a-Service protects corporate data servers from security threats. Purewire will use Opinity's software to help distinguish between real and malicious users.   This is a smart move by Purewire.  Opinity is a good concept, but I can forsee too many ways to create false negatives.