Dr. Brook Magnanti has a book out, based on her blog. As a result, many of the most useful parts of the blog have been deleted. Which is really annoying! By restricting those articles to the dead-tree form, she has restricted their usefulness: I cannot make a link to a book page when I want to make an example.
By comparison, Bruce Schneier also has a book of compiled articles from his blog - but has left the blog entries up.