According to this Ars Technica post, authorities in New York have decided that law blogs are lawyer advertising.
I'm not sure that all law blogs are created equal when it comes to whether they should be considered a form of advertising. According to Alton, this blog supposedly made the RK enemies list, whatever that means. If the blog turns people off instead of turning them on, is it advertising? On the other hand, being on RK's boo-hoo list might be a badge of merit in some circles.