A fairly devastating takedown of Jeff Jarvis's new book Public Parts by Evgeny Morozov (author of The Net Delusion):
http://www.tnr.com/print/article/books/magazine/96116/the-internet-intellectual (print version – should not require sign-in).
I almost feel bad for Jarvis. It seems like a solid critique, and tackles not only Jarvis but other Internet utopians (e.g. Clay Shirky), but it's perhaps a little mean-spirited.