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.
Avalon Hill bought the 3M bookshelf line of games, and then Hasborg assimilated AH. Hasbro has sales rights I believe, but strangely, Kosmos is the only company selling new sets these days. Brain King might want to stay away from proprietary games, but I hope they join PBMserv, Little Golem, and Zillions in offering Twixt to the public.