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 couple of other simple games vatiations that shouldn't be too hard to bring to this site - possible Dark Gothic Chess, Dark Janus Chess, Dark .... other Chess?
I like Dark Chess since I feel I have more of an advantage (since I stink at regular Chess), and to bring the Darkness to a couple of the other types of chess would be very interesting... plus I would not think too hard to program. :-)