I get tags and I think they are terrific! As a die-hard librarian, I have suffered with kids trying to get them to "think" intellectually about the things for which they are searching--to think how it should be listed in a catalog. Tags are more user-driven and will be MUCH easier for students (especially elementary) to use!
I regiestered my blog with technorati and also installed two of the widgets. One so that people can add my blog to their technorati favorites and the other to create a tag cloud.
I am getting more comments posted and am loving that! It is amazing to see who comments and what they have to say! I have a fellow scrapbooker from PA commenting on my web 2.0 blog! This is too much fun!