In a New York Times article David F. Gallagher describes "A Rift Among Bloggers". Gallagher has his own weblog at lightningfield.com and more about the article in his 6.10.2002 entry.

"Blog" is, in its essence, little more than a format -- chronological content -- that has been around in one form or another since the beginnings of the Web. Certainly the emphasis on the weblog as the anchor for a site is reasonably new, though not, of course, on news sites.

There is room for many, many different sorts of blogs. From 20,000 feet one may well see warblogs and tech blogs, but I have always found the diversity broader and more interesting than that.

And what about the (mostly teenage) everything/nothing blogs? Between Blogger and LiveJournal there must be close to a million blogs now.