I know that this bus left the station, but still...
It would have been really nice if one could add a map to the list of played maps. that way, if one gets a map that is too hard on the first try (cough, cough ... July 31, 2134 (http://knucklecracker.com/creeperworld/viewscores.php?missionGroup=chronom&month=6&day=31&year1=2&year2=1&year3=3&year4=4)), one could add this map to one's list of maps to revisit later.
yes, that would be very useful. also if you're useing the random button and don't want to write it down (which is a hassle) you could mark maps that you want to play but don't have time right now.