I wonder if the blogosphere is actually quite small?

My current client has around 60,000 employees, half in the UK. But on the active blogs there are probably only 20 or 30 commentors, and many of them post to all the blogs and join the discussion groups too.

Perhaps it's like a pyramid selling thing....after a while you just run out of possible audience and it becomes incestuous.

Reminds me of my favourite corporate statistic: If an organisation has more than 400 people they can spend all their time interacting with each other and never get any actual work done. Wait. I'll just go and see if I can verify that...