"Social Graph"
I was interested in the reference to a "social graph" and the minning of social data. I do agree that it's the way forward. I would be interested to read a more detailed atricle on how you see that happening, what the practicalities are facing organisations (e.g. data cleansing as pointed out by Brian J. Bartlett) and what it means on a personal level.
You should check out the startup Lenddo who are doing social media based reputation management.
ps I have no involvement with this business, but it does seem to relate to your article.