Henry Farrell has just added one to the pile:
Henry Farrell: Yale University Press has just released Yochai Benkler's The Wealth of Networks: How Social Production Transforms Markets and Freedom. You can buy it at Powells, and Amazon, but it's also available from Benkler under Creative Commons with an associated wiki. There'll be more about this book on CT soon -- for the moment, suffice to say that I think that this is a really important book, not only for people interested in the politics of technology, but for people interested in left or liberal politics more generally. It fizzes with ideas.