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.
the only problem I see with these time limits is that whoever moves second can force the first one to lose because of time limits, eg, 10 in 5 days, the second player just has to wait 4 days 23 hours and 59 minusts to move, then the first player cannot possibly make 4 moves in 1 minnute, forcing the 1st player to time out since his timer would start first