Three birds with one stone, here: the Awards List, Technorati, and Library Thing. Overall feeling: too much to explore; too little time!
The Award list was really helpful: I found many of the tools I already use there, and was surprised by the absence of a few. So, Flickr is there, but not Blogger. Technorati and Library Thing were there; although I was surprised at the latter being in third place. And I think I may want to try out Ma.gnolia which sounds like a combination of a bookmarking tool and a reader.
Technorati just seems huge, and I plan to jump into the fray and add my blog this week. Library Thing looks like a tremendous resource for me, as many students and adults come in the library looking for books similar to those they have just read; also, I am always wanting reviews of those things I have not read. It will be a wonderful asset this year.