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.
since we're on the topic of new games, I would like to se a 3-D chess variant added to this site. it literally adds a whole new dimension to the game. http://www.geocities.com/william_dagostino/ you can find the rules of one such variant here. I've unfortunately never played due to a lack of anyone wanting to play with me.
another game which adds a new dimension is 3D connect 4 i am sure a lot of players will play it ... its played in a cube of 4x4x4 fields (you can use 4 game boards to play it, display them above each other)