ICTlogy

Though Technorati does not maintain a site/page with statistics, it does sometime publish some stats about the state of the blogosphere really really useful.

Those stats are usually published in:

• Technorati Blog, normally under the blogosphere category
• Sifry's Alerts, a blog by Dave Sifry (Technorati founder)

Examples:

• State of the Blogosphere, April 2006 Part 1: On Blogosphere Growth
• State of the Blogosphere, April 2006 Part 2: On Language and Tagging
• State of the Blogosphere, February 2006 Part 1: On Blogosphere Growth