So I started playing around with Technorati. When doing a keyword search for "Learning 2.0" in Blog Posts, I got 27,949 results from all blogs with any authority in any language. When doing a keyword search for "Learning 2.0" in Blog Directory, I got 11 blogs with authority. Of course both of these searches can be refined, but I was surprised by the number of blogs that I got as well as the different number of results depending on the way I searched. It is amazing how much information can be found using Technorati. I now understand why it is the leading authority. I also enjoyed watching the 12 minute Del.icio.us tutorial to get an overview in the last exercise.