What is a blog?

 From Wikipedia:

"A blog (a portmanteau of web log) is a website where entries are written in chronological order and commonly displayed in reverse chronological order. "Blog" can also be used as a verb, meaning to maintain or add content to a blog.  Blogs provide commentary or news on a particular subject such as food, politics, or local news; some function as more personal online diaries. A typical blog combines text, images, and links to other blogs, web pages, and other media related to its topic. The ability for readers to leave comments in an interactive format is an important part of many blogs."

 - Retrieved from http://en.wikipedia.org/wiki/Blog on August 13, 2007

What's the difference between a blog "post" and a blog "comment"?

• A "post" is an entry in a blog that is provided (written) by the owner/creator of the blog, or by others to whom the owner has given posting rights to
• A "comment" is a reaction to a post that is provided by someone who has read the post

Let's take a look:

An edublog:

http://practicaltheory.org/serendipity/

One specific post, with related comments, at that blog:

http://practicaltheory.org/serendipity/index.php?/archives/863-SLAs-Three-Questions-and-School-2.0.html

Time to interact with a blog:

http://principalblogs.typepad.com/jeanettejohnson/

Congratulations!  You've just joined the world of Web 2.0!