There have been some great reports on law firm blogs recently.
Kevin O'Keefe published an update to regular reporting of law firm blogs: State of the AmLaw 200 Blogosphere, November 2008
Greg Lambert put together a list of Large Law Firm Officially Sanctioned Blogs and followed up with a Report Card on Whether The Law Firms Were Blog-Proud or Blog Tolerant. The report card credits those law firms that make it very easy to find their attorney blogs as being "blog-proud."
Kevin lists 159 blogs at 72 of the AmLaw 200 law firms. Greg lists 141 blogs at 56 firms. Kevin points out 37 blogs were not firm branded. Greg should add a third list of those firms that are "blog-intolerant."
The remarkable side of these stories is the tremendous growth. Kevin point out that in August 2007, only 39 firms were blogging with only 74 blogs. Over the past 15 months, those numbers have doubled. It looks like Kevin is single-handedly responsible for the growth with 79% of the firm branded blogs using Kevin's Lexblog platform.