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.
tazman7474: It needn't be too expensive. The list is already sorted by time-to-go or whatever. By encoding a single key out of the groups that a game belongs to then it would still only require a simple sort. The difficulty is in programming the groups and building the user interface for maintaining them. That's more an issue of development time than of server time.