There's clearly still work being done on it, though, and I can't imagine anyone has lost enthusiasm. Having a standard i18n mechanism with jQuery is very exciting indeed. (And I understand there's an effort to make this same feature set available in a library-agnostic manner as well, which is even more exciting, just in the sense of making the web better for everyone.)
Does anyone know the status and timeline for this work? I'm not seeing that in the github readme. There would seem to be only two outstanding issues (as I write this).