I found this article on the The Pew Internet & American Life Project. It gives a portrait of blogging that is limiting in nature. By that I mean, the reason some blog. When I think of Seth Godin or Terry Walling I know blogging has more impact than the Pew study.
Pew set out to give us a snapshot of the phenom of blogging. In light of that, it seems snapshot is appropriate. Just don’t underestimate some of our culture’s great thinkers.