I haven’t picked the book Citizen Marketers yet, but it does sound interesting. On their Church of the Customer Blog they describe the book as this: “Citizen Marketers” is all about social media and how it’s fostering the growth of amateur culture. The early adopters of social media are at the forefront of a societal shift that’s rapidly changing the nature of marketing, public relations and corporate communications. The traditional era of one-way message delivery taught in business schools and practiced for decades by all manner of business is being supplanted by two-way and multiple-way message delivery, where everyday people are the messengers as well as the message itself.
There’s also a pretty good interview with Guy Kawasaki and the two authours at http://blog.guykawasaki.com/2006/12/ten_questions_w.html