I recently stumbled upon David Sifry, founder of Technorati's post on the State of the Blogosphere. The short of it is that the number of blogs are growing briskly, with the number of blogs doubling every 236 days, although the rate of growth is cooling down a bit. There are now around 57+mm blogs out there, with ~55% of them being active.
The post is pretty interesting, although it's not clear to me if Technorati is getting this data from the major services or just from people that subscribe to Technorati's service. If it's the latter, then I would say that this data is only reflective of a specific subsegment of the blogosphere. Moving on.
One thing that caught my eye was that the average # of posts/day is growing a lot more slowly than the # of blogs (roughly 3x since late '04 vs. 10x since late '04). My guess is that blogging - like the SAT's - is increasingly being done by the mainstream, with a higher number of people writing on a semi-frequent basis. So if you think my blog is mediocre and poorly updated, just wait until the rest of the world really gets on the bandwagon.
Couple other quick points:
1. The NYTimes is getting about 3.5x more trackbacks (I think that's what inbound sources is referring to) than Fox News. Much like the Dems winning the elections, that makes me happy.
2. The Japanese are almost as blog-crazy as the English (33% vs. 39% of posts). I am really, really curious about what they write about.
Anyway, that's all for now.