First off, I'll state that I'm not getting onto the "let's tear down Facebook bandwagon". I have a tempered attitude towards the changing SocNet landscape (as much as I do enjoy a well placed tirade). There are a lot of people predicting Facebook and Zuckerberg's demise, but the fact is there are a lot of smart parties at that table with an interest in not imploding. It's not just Zuckerberg's to lose. I'd rather talk about more fundamental forces, largely external to Facebook and the other SocNets, that will contribute to change.