OK, I was thinking we'd all just be muddling around together in 101 level posts. For instance I might bring up an article I read or something and see if anyone else has read it/is interested in reading it/discussing it. If several people say yes and that it's something they wanted to learn about I could tag the post 101 and that way people more learned in a particular area could feel free to skip the post instead of wading in and getting frustrated as ithiliana said below.

Someone who has some academic experience, self education experience, or personal experience on a particular subject and who wants to try leading a discussion? We'll have a specific tag or subject header or something for those discussions. Does that make sense? I think those lead "authoratative" discussions will be few and far between.