Historically, new forums are implemented after it has been established that there's enough traffic in an existing froum to support it.
Also, I don't know about the precedent for establishing a forum here to support a particular publisher or product. We don't have a forum dedicated to just Arcana Unearthed, for example. More analogously, we don't have a forum specifically for Neverwinter Nights or OpenRPG. Why should this program get a forum of it's very own when others don't?