Great piece! This is the aspect of Google+ that excites me the most, that the one company whose incentives are most closely aligned with a vibrant and open web has finally released a social product to mostly positive critical and popular sentiment.<p>As you note, the examples of Buzz and Wave (not to mention PubSubHubbub) and especially their open federation architectures indicate Google's open intentions and seriousness on the subject.<p>The other great example of Google entering an industry to crack it open, which you neglected to mention in the article, is Android. While critics have challenged Google's claims to openness in that arena, I have always found it pretty clear that their intentions there have been to open the field, and the setbacks that they've encountered were due to the inherent tension between openness to carriers/vendors and openness to users/developers. As far as I can tell, that tension doesn't exist in the social space.