Does this require using Mozilla's servers on the backend? I've played with ShareJS and a commercial hosted OT service, but they all required talking to the server.
So, I assume this does too, but I haven't seen where I could install it on my server.
[Team member here] We haven't been very focused on the hosting story, in part because lots of people have their own requirements, and we can't predict what they are. And maybe because predicting what they are is boring. I know some hooks for New Relic have been added to the server. It's also a super-simple server that only keeps things in memory, so it's pretty darn easy to handle. Just one file: https://github.com/mozilla/togetherjs/blob/develop/hub/serve... (and only one dependency, for WebSockets).
So, I assume this does too, but I haven't seen where I could install it on my server.