Warblogosphere a la Daily Pundit
Bill Quick has a good estimate of the number of warblogs in the blogosphere and a complete list of names.
We really don't have a way to measure all this with any accuracy, but the Myelin blogging ecosystem has been measuring linkages on a daily basis on more than 8300 blogs for some time now. I picked the top hundred off that list, and then discarded the group type operations like slashdot, which don't really strike me as blogs so much as usenet groups updated for the web.
...I think this challenges the notion that the new Warblogger faction is a trivial part of the entire blogosphere. I would wager that these top eighty blogs, which make up less than one percent of the 8300+ sampled, garner eighty percent of the traffic, and nearly half of that goes to the upstarts.