Easily Distracted also discusses the "academic blogging" versus "academics who blog" issue:
In terms of my recent musings about the limits and lifespan of my own commitment to blogging, I find that it’s impossible for me to stay clearly on one side or the other of “academic blog” versus “academic who blogs”. . . . There’s just something in me, maybe a masculine something, that balks at excessive self-exploration in this online format, or that sets the “too much information” bar at a fairly restrictive point.
This, and Michael Berube's closing down of his blog, made me think. These are genuine questions, not an attempt to criticize those I've quoted here.