Sorry, my comment wasn't exactly chalked full of useful criticism. I found this and the Firefox post to be largely rants with either no point or nothing new in the conversation. We know Google is struggling with social, we know people are trying to compete with Facebook without cloning them, and we know that privacy+social is hard. I just don't see what another "Firefox is jumped the shark" or "Google will fail again at social" contributes to the discussion.
What have you built lately?