"Very true. The value of a +1 would be contingent on identity. In fact, a +1 could hold more weight based on the influence and subject matter expertise of the author. So a +1 by Fred Wilson on Venture Funding would carry a lot of weight, while his same +1 on, say, hang gliding might not count for nearly as much. Once you connect identity with authorship (that's both blogs, comments, Tweets etc.) you can begin to understand the web of people and how each is contributing to its makeup." - AJ Kohn