Lawrence Lessig informs that Benkler's new book is out (Amazon's website says: Not yet released).
"This is -- by far -- the most important and powerful book written in the fields that matter most to me in the last ten years .."
and certainly, I will go by his recommentation and download the book (3,6 MB, PDF - under CC) right away.
The Wealth of Networks
How Social Production Transforms Markets and Freedom
There is also a wiki on the subject (and HTML version)
And/or you can buy it at Amazon.com (soon)