When I drafted it I have envisioned that someone could select, say, Maemo 5 in OS and N900 in Hardware.

I guess technically that's "mid-level"... but I didn't see a need for there to be selectable boxes next to, say, "games" under "maemo 5" so that you see only new posts from there.

I suppose it could be removed, for the sole purpose of customization and granularity.