Google Blog Search was the easiest of the searches that were listed. I found several sites that would be helpful to myself and other teachers at my school. It was easy to use and I found several hits for each key word I submitted. Technorati is more confusing. I think that part of it was that it kept flipping back to searching through posts and I wanted to search for blogs.
Ask A Tech Teacher is a good blog that gives lesson plans and tech tips. It also post websites for kids with an explanation of what the user will be able to do / find on the website.
SMART Board goodies was an interesting blog that gives examples of activities that could be useful in the classroom and the library.