In his "State of the Blogosphere," report, Sifry said that over 75,000 new weblogs are created every day, which means that on average, a new weblog is created every second of every day - and 13.7 million bloggers are still posting 3 months after their blogs are created.

Other highlights of the report:

-  Technorati now tracks over 27.2 Million blogs.
-  The blogosphere is doubling in size every 5 and a half months.
-  It is now over 60 times bigger than it was 3 years ago.
-  On average, a new weblog is created every second of every day.
-  13.7 million bloggers are still posting 3 months after their blogs are created.
-  Spings (Spam Pings) can sometimes account for as much as 60% of the total daily pings Technorati receives.
-  Sophisticated spam management tools eliminate the spings and find that about 9% of new blogs are spam or machine generated.
-  Technorati tracks about 1.2 million new blog posts each day, about 50,000 per hour.
-  Over 81 million posts with tags since January 2005, increasing by 400,000 per day.
-  Blog Finder has over 850,000 blogs, and over 2,500 popular categories have attracted a critical mass of topical bloggers.

Source: http://www.technorati.com/