Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
I think a doubling cube which has been asked about in the past would be a great addition to multiple game matches. Obviously in single game matches it makes no sense. I would be more inclined to play multiple game matches if the doubling cube was put into play here at brainking. It adds more strategy to backgammon matches as well.