I actually am a prereader at EqD (kits).
I don't consider anything that posts as much fanfiction as we do an introduction to the fandom. I mean, fanfics turn a lot of people off of a lot of things. Plus we have way too many inside references and memes of our own to be a good intro. There is very little in the way of discourse since it's a blog.
Maybe the EqD irc channels. I'd hang out in there more but I'm too busy with the rest of my pony life.