Just got a copy of Digital Vertigo: How Today's Online Social Revolution Is Dividing, Diminishing, and Disorienting Us by Andrew Keen.  Looks to be an interesting read. 

The book is a critique of Web 3.0.  Keen is known for his view that the current Internet culture and the Web 2.0 trend may be debasing culture. 

Keen is concerned about the way that the current Internet culture undermines the authority of learned experts and the work of professionals. 

He states that the greater the amount of social networking that occurs, the lonelier we seem to be. 

In Digital Vertigo: How Today's Online Social Revolution Is Dividing, Diminishing, and Disorienting Us, Andrew Keen is either Chicken Little or prophetic.  Will let you know in a full review.