The NY State Bar Association (my bar association) has proposed rules on advertising by lawyers. As far as I can tell, they seem to embrace blogs, and, in my initial read, treat them less favorably than, for example, the unsolicited hard copy material I receive everyday from law firms, who, I imagine, have purchased mailing lists of lawyers from whom, I wonder. As example of a rule that strikes me as odd, it seems that I have to print out a copy of each new post and mail it to the attorney disclipinary committee on advertising. I probably post 1000 items a year.
Proposed rules here. Commentary from Prof. Volokh here.. Comments are due November 15.