Tillman,
I'm working on a Wiki package. I am writing it from scratch, but I've wondered if building on ETP2 wouldn't be a better way.
I'm trying to make the Wiki package general so that with some modifications you can have different applications. Especifically, I want a Cookbook package with linking, ratings, moderation. I don't know if it'll end up being Wiki->Cookbook or two separate packages. We'll see.