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 suggest to allow en-passant rule in screen chess and crazy screen chess. I used to this rule in chess and was very amazed that this is not allowed when playing one screen chess game.