Ugh. Levinson is rather full of himself, but knowledgeable about different sources of new new media (i.e. Facebook, Twitter, YouTube, Wikipedia...). It really is pretty well written, but Levinson references his own blog, podcast, science-fiction books, and essentially anything else he has created with even the slightest relevance to the topic at hand. The book isn't all that long as it is, but I swear it could 25 pages shorter if all the self-referential things were removed.
Overall, I assume it would be difficult to find a book with the range of information New New Media contains. Maybe Levinson's ruthless self promotion won't bother you, but it just didn't sit well with me.