[BBC] Commentary: CEO Blogs

http://news.bbc.co.uk/1/hi/business/4576737.stm

Hmm this makes me wonder.  If it's true that those pointy-haired individuals at the top of the ladder have nothing useful to contribute to a blog, then at what point do you stop being "eligible?"  How high must you rise before you transform from a fount of knowledge to a fount of marketing?