Web 2.0 tools: Blogs

Web 2.0 websites allow users to do more than just retrieve information. They can build on the interactive facilities of "Web 1.0" to provide "Network as platform" computing, allowing users to run software-applications entirely through a browser.Users can own the data on a Web 2.0 site and exercise control over that data. These sites may have an "Architecture of participation" that encourages users to add value to the application as they use it.

Blogs, or Web logs, are online journals that are updated frequently, sometimes even daily. An update, (also called an entry or a post) is usually quite short, perhaps just a few sentences, and readers can often respond to an entry online. People who write blogs are commonly called bloggers. Bloggers call themselves and their blogs the blogosphere.

http://www.dummies.com/how-to/.../writing-a-good-blog.html -
http://www.youtube.com/watch?v=bsNcjya56v8