This was my first visit to Technorati, and I was enthralled with it! Just like your favorite TV shows are being rated for popularity, so are blogs. Who knew! Most of the top blogs are entertainment, political, or technology in nature. "The Huffington Post" is currently the #1 blog. (I do enjoy her blog). With most types of information and media, there is always a popularity contest, mainly for money and advertising. The blog is set apart from most other media that anyone with a computer and internet connection can publish one. The "any-man" now has a greater chance of being heard.
Tags are important, because they lead users to your page. Tags are basically keywords that one uses for the subject they seek. The goal is to get a user to your blog with a tag, since they may be interested in your information.