Technorati is great tool for searching blogs. I really found searching by tags as a very useful element. If you weren't able to fine what you are searching in one option, try another.
I wasn't too surprised by the popular searches, eventhough they are not the types of things I search. It looked more like topics on the entertainment shows on TV with a few news headlines added in. I added the Technorati top tags to my blog. I really like that cloud of words. If I were asked a few months ago what a cloud was pertaining to the internet, I would have had no idea.