Oedb (Online Education Database) has released a rankings list of the top 25 librarian bloggers.  Using Google Page Rank, Alexa Rank, Technorati Authority and Bloglines Subscribers, they have listed what they consider the biggest blogs by librarians.

Unfortunately, its missing what I would consider to be top rankers from its review, including Information Wants to be Free and Tame the Web amongst others, but check them out their results and see what you think!