What is a blog? A regularly updated journal published on the Web.

How many people blog? Technorati.com tracks about 112.8 million public blogs worldwide.

Other statistics:

• 175,000 new blogs are created each day

• 1.6 million posts are submitted each day, or about 18 updates a second

How to make your blog private

• Blogger: help.blogger.com/bin/answer.py?answer=42673&query=private&topic=&type=f

• WordPress.com: faq.wordpress.com/category/security/

Source: technorati.com