I played with Technorati today. I searched School Library Learning 2.0 using tags, the blog directory and keyword search. To find these options you had to go to advanced search. When I used the Blog Keyword search, I went to exact phrase and keyed in the phrase. I got 211 hits - all from our online learning community. With the tag search I got over 1 000 then refined the search using Boolean (" ") and got 205. The Hey Jude blog came up as well as the blogs from this tutorial. With the Blog Directory search, I got 17 hits - not sure why and really don't want to take the time to figure out why.
Would I use Technorati with students? I would if I was teaching a lesson on how to recognize authority and refining searches.
I usually find good blogs to follow by seeing who my experts are following - people Like Joyce Valenza, Doug Johnson and David Warlick. Much easier!