I've been busy elsewhere, but know that work does continue even if it's just a few minutes here and there, and "side examples" / standalone snippets waiting to be folded into the main codebase.
I really want to hammer down the permission system, user specific settings, and get the "better" anonymous function stack template system in place before I dive into categories/topics/replies. That could take a bit given my time restrictions for working on it.
Someone suggested that I crowdfund this. What keeps me from putting real time into it is the need to prioritize paying work ahead of this project. I dunno... whaddayew folks think of that?