I know I'm doing things out of order. After looking at Things #21, 22, I realized I don't have time to complete 21 before leaving on vacation - so it'll be done when I get back; maybe I'll bore everyone with vacation pictures on the podcast!
Nings were interesting; I spent most of my time on the Teacher Ning. There are lots of people who apparently spend lots of time on the computer! I think it could be a help when looking for lesson ideas or asking a question of the world "at large". I also think a Ning could be set up for a class or grade level. I'm not sure how much time I'd spend on an official site like Teacher Ning - I'm usually so far behind that I don't don't have too much time for blogging, etc. It would certainly be one of the tools I use, but there are a number of ways classes/kids/teachers can communicate as groups, so I'd pick the best one for whatever I was doing. I do see that it might work as a Facebook type of thing, but more specifically.