Mahendra Palsule right now on Google+ and the interest and social graphs: "Facebook has done a not-so-great job capturing users’ interests. Many people have ‘Liked’ hundreds of pages just because they were asked to do so by their friends. Facebook’s obsession with and overreliance on the social graph has corrupted their interest graph, and this might well be Facebook’s Achilles Heel in the long term. Google Plus takes a different approach. The goal of Sparks is to capture your true interests. It is in a primitive state at present, but I’m talking about the Big Picture here!"

Mahendra Palsule last march on the "Age of Relevance":
http://techcrunch.com/2011/03/03/the-age-of-relevance/