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.
A ladder is an ordered list of players, where challenges by lower ranked players are required to change the order.
On other sites this seems to me to favour those players who play often and is not as satisfying as ratings or tournaments. I wouldn't bother personally.