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.
Fencer, have you considered putting on grandchess? It is similar to gothic, which is already here, but IMO better than gothic. Rules and details can be obtained at mindsports.net
some of the games on mindsports.net look interesting, such as havannah or congo. Some of the explanations of the rules are terrible though. I tihnk it would be interesting to have congo and havannah here on this site.