Technorati currently tracking 133+ million blogs (early 2009) (see state of the blogosphere report)
Weblog:A blog is a website where entries are made in journal style and displayed in a reverse chronological order.
A typical blog combines text, images, and links to other blogs, web
pages, and other media related to its topic. Most blogs are primarily
textual although some focus on photographs (photoblog), videos (vlog), or audio (podcasting), and are part of a wider network of social media. (From Wikipedia)
Examples from higher ed:![Wordpress logo]()
Using blogs for web content management.