Blogs are just one way in which the face of the web has changed. According to Tim O’Reilly, “a blog is just a homepage in the form of a personal diary. Blogs can be used in a variety of ways, especially in the educational sense. Currently I have created a blog for my telecommunications class. Using a blog I am able to explore a topic of interest, (in this case web 2.0 technologies), and discuss the role it plays in society. Because anyone can post a comment to a blog, lively discussions about a topic can ensue.
The following link will take you to Google Blog Search where you can locate blogs on a variety of topics.