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.
skipinnz: Sure, just send the person a message without declining or accepting the game invitation. Explain to them that you want to play the game and will accept as soon as you have the free space. Assuming they don't delete the game, accept it when you have the free space.