What constitutes a popular blog?

I note that Jeremy is selling a new round of advertising for his blog. That makes me wonder what constitutes sufficient traffic to make one some sort of pundit. Jeremy claims 250,000 visitors a month, I’m going to break (all things being equal) 700,000 hits per month. How much traffic does Robert Scoble see?

It’s hard to tell with a medium like this whether one is actually being heard, or if one should just go an have a lie down instead.

[tags: popularity traffic advertising]