Wikinomics by Don Tapscott and Anthony Williams
Despite the name, which suggests both a me-too jumping on the Levitt/Dubner Freakonomics bandwagon and a possible reductive identification of all evolving Web technologies with wikis, this is a surprisingly good book, written at a calibrated level of abstraction, with a tasteful blend of concepts, anecdotes and statistics. It has none of the anecdotes-of-a-gunslinger-economist machismo of Freakonomics, and the wiki in the title is synecdoche, not reductive imagining.
