Yes, we're still working on it. (E.g. we were discussing the concept "only" a couple days ago.)
Right now, our main blocker is technical: we want a JavaScript based method for rendering it from a DSL, because making, loading, & maintaining images in the doc is a huge pain.
We've provisionally decided on using Cytoscape.js, but it needs some extensions to work for us — e.g. cubic splines (it only has quadratic) and relative angles of attachment for edges to nodes. My areas of expertise are mainly back end web dev & analytics, and Alex's are mainly academic math & coding competitions, so JS isn't particularly easy for either of us.
We'd appreciate help with this. It's on my GitHub¹; get in contact personally² if interested.
As for a speaker community, we don't have one currently, though over the years we've had around 3-4 people express interest. We never really considered it something that others would want to do (though we've always been quite interested in getting feedback, suggestions, etc., and we'd be willing to engage in in-UNLWS dialogue).
However, this seems like roughly the critical mass needed for such a community, so I'll try to set one up. Please contact me directly², and LMK any platform preferences.