I can guarantee there are at least a dozen potential startups in this idea alone. Imagine some version of Linkedin or OKCupid, or even some general purpose scraper that correlates identities and social media accounts through facial recognition and online photos.

Even better, facial recognition plus a decent method of determining height, weight and ethinicity, and you have an x-ray specs app. The first person to make that work is probably going to be a millionaire.