What is a Blogger Worth to a Law Firm?

In the wake of moves by two big-name tech bloggers, Law.com has an interesting article on how to value a law firm blogger.
Note the response by Kevin O’Keefe:
“These recent moves should be wake up calls to law firms with high-profile lawyer bloggers. Many of your high-paid marketing and PR people have not a clue about the power of blogging and the marketing value of these blogging lawyers.
“Not only are such lawyers a source for new work, but they can also bring the firm into this century when it comes to effective Internet marketing by being a mentor to other lawyers learning to blog. Don’t appreciate what these bloggers are bringing to the firm and you are going to loose them, their rainmaking and much more.”