The Wall Street Journal takes on the question of weblogs:
If you read press coverage about blogs, you might conclude that just about all Americans are reading a blog. But then you wouldn’t have time to read the press coverage, because if surveys are to be believed, you’re probably busy creating your own blog.
The numbers of the blogosphere range widely. Are there 10 million blogs, or 32 million? Do a quarter of online Americans really read blogs, as one oft-cited survey found? And why do rankings of the most popular blogs vary so much?
Measuring the Impact of Blogs Requires More Than Counting [online.wsj.com]