It's useful as a snapshot of a time in the development of online interactions. By the time she gets to the end of the book, she describes how much of what she wrote about has already changed. It's an easy read; get a library copy. :)

Regarding Nagle in general, she's part of a small but growing group of people who refer to themselves (sometimes, for lack of a better description) as post-left. Their argument is that the left has become a petite bourgeois project that is hostile to the working class. I mean... how can you argue with that?