The following two posts are about advertising and new business models.
"A NEW fad is sweeping across Silicon Valley, causing excitement, confusion a
From the NY Times, "The Gated Social Network. I don't want to belong to any club that will accept me as a member, Groucho Marx famously said. He would have loved the Web's newest social networks."
I snagged this article from wharton
Business development idea - the growing market for business social networking
This is the what and how of social information management