The blogosphere is now more than 60 times larger than it was merely three years ago, and it continues to double in size every 5.5 months, according to Technorati's most recent installment of the "State of the Blogosphere" report by David Sifry. Technorati now tracks over 27.2 million blogs, with 75,000 new weblogs being created daily - or, on average, a new blog every second. Technorati also tracks about 1.2 million new blog posts each day - roughly 50,000 per hour.
Some 13.7 million bloggers are still posting at least three months after their blogs were created (compared with 10.4 million in October), and 2.7 million or so bloggers are updating their blogs at least weekly.
Click to enlarge
Spam pings can account for as much as 60 percent of total daily pings, according to Technorati, and about 9 percent of new blogs are spam blogs or machine generated (not included in the above numbers).
