Jim Holincheck of Gartner, Charlene Li of Forrester and Jason Corsello of Yankee Group all have their own blogs. Jason has even joined the Irregulars. Each of them is very good - and each has a great personal brand (BTW - I worked with Jim for a couple of years).
I think us bloggers should get reciprocity on their analyst firm channels -)
You do have to wonder about the analyst business model, though. Both Gartner and Forrester spent almost 45% of their revenues on SG&A last year (I suspect Yankee has similar metrics). Yet their readership channel is not growing at even a fraction of that of Google's or Technorati's.
By my estimate, each of these analysts probably makes 5 to 15% of what they bring their firms in subscription and consulting revenues. At some point, these smart folks and others are going to ask how much the firm brand and channel really adds to their own personal brand and rapidly growing blogging channels. Analyst firms are going to have to take a hard look at their channel costs and effectiveness, and shift some of savings to lower pricing and some to these stars.