Going to post an update since it's been a while. Currently working on RTB v5 which is essentially a re-write of the website and API with the addition of a save uploading system/gallery. There's also another top secret feature which will be introduced which I'm going to say approximately nothing about - but it's a pretty exciting one.
I'm still intending to release a patch for v4 (I can't remember what version we're on, but +0.1 to it) which will introduce player-owned chat rooms, although there are a few complications about how that will fit into the chat protocol. I'll figure it out. I'll also be patching those errors coming from the networking package.
Keep being patient!