What is it about?
In the first half of this book, David Meerman Scott explains different platforms, e.g. blogs, news releases or social networking. In the second half he writes about planning your marketing strategy and tips for execute them on these platforms.
Segment your customers. Do not try to sell your product instead try to help your (prospective) customer. Give away valuable content and establish a relationship to your online community.
The first half is not that interesting for people who are not so new to the web. The second half includes some nice ideas. E.g. customer persona, i.e. you take one individual of your market segment and build a story for this individual. Also tips on individual topics like getting press coverage are quite useful.