There's been a reshuffle of the forum coming for a long time now. It's a bit like firmware update for some devices out there
Joking aside, people are working on reorganising the forum structure. I think they should use Tags and filters instead of hard-coded sub-forums, as it doesn't seem to be too easy to create these. People have been asking for a separate Onyx Boox sub-forum for a while for this same reason (avoid polluting the News forum with device specific discussions).