instead of asking to opensource mui, we should push forward zune on aros and help to debug its 68k port by bernd, distributed with the afaos.
edit: as for w3d i must admit i do not know its actual licence status. as far as i know the system was originally developed by haage and partner, so maybe it is again only licenced to hyperion along with a right to develop drivers since h&p is not in amiga buissness anymore, but could still remain the holder of ip. somone has any clue on that? otherwise we could put it down in the future in favour of gallium anyway.