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Re:Show HN: Review my project - profilepin.com by ronnier on Tuesday October 12, 2010 @11:37AM (#1783746)
And another, which is the most exciting to me: http://about.me
Re:Show HN: Review my project - profilepin.com by aeden on Wednesday October 13, 2010 @03:06AM (#1786380)
About.me is another example of an entity that is differentiating, specifically by focusing on the analytics side of your personal brand.

FWIW, I'm not sure if any of these companies are actually going to find a way to profitability.