Alrighty. Put up a nice basic article, we just need more content on it. If you check the history and see what it was before, it was even more basic.
Would "North American" be appropriate? I'm sure we have a fair number of Europeans, maybe "Western" or "Anglophone" would be a better idea.
It's probably best to focus on http://encyclopediadramatica.com/4-ch mainly because ED is how many of us found out about the chans. Make it clear that we are focused mainly on western culture, our own, I'm sick of weeaboos that only talk about Japan and Japanese culture.