I think they have to appear in "New Posts", otherwise they'll never get seen by the people who only interact with the forum through "New Posts".

As for removing them from "Active Topics", I think it makes sense if we want to emphasise this as a discussion forum for Maemo-related topics; but not if we want to show a vibrant and active community.

Having said that, I'd probably lean to agreeing with you and removing them from "Active Topics".