I haven't read the book but technical blogging has been really working out well for me. Thanks to my blog ( http://blog.vjeux.com/ ) I've been contacted by many companies and recruited for an awesome job!

I've written an article about all the benefits of a technical blog if you are interested in my views on the subject :)

http://blog.vjeux.com/2011/analysis/start-a-technical-blog-i...