Sun's CEO Jonathan Schwartz on CEO's Blogging

Kevin: Last year you said every CEO should have a blog. Not a lot do. Why not?
Jonathan: Five years ago, most CEOs had their admins print out their email. The job of a leader is to communicate. via David Weinberger

Yes, communicate internally with colleagues and externally with customers and suppliers. I think Richard Charkin (Nature) is still the only CEO in STM world who is "communicating" since my original post.