I’ve gone ahead and created two new categories.
One is Community Projects #projects – it’s a container for projects, as we need them.
I’ve also gone ahead and created a #projects:documentation category. Given the interest and energy in the thread about Github Making changes to tiddlywiki.com via GitHub and Pull Requests (PR) – and the general way that people are trying to make improvements in a single thread 
– I’ve gone ahead and done this for my own sanity.
I moved my CLA post to a new thread: Reviewing CLA policy – as one of the things I am going to work on.
I invite others to also move / copy their suggestions into new threads if they want to work on it / want to collaborate with others in doing it.
I invite people to join the public @Documentation group if they want to actively volunteer, although anyone can participate in that forum.
I also intend to create an Open Collective group + category as the second Community Project. That one I need to run in any case, because I’m an admin! I’ll do an announce post about what I’m thinking and make a call for collaborators.