@Barrabas: It's the playlist, not the map. If it was the map that would be quite ludicrous. It's just in custom games now, which renders it completely useless. They say it'll be back for future double XP weekends, but that's no good.
Who knows how often they will be, and Nuketown is so boosty to begin with, double XP just makes me feel like I'm cheating myself. I'm already halfway through prestige 1 (which is nothing anyway) but I've never gotten that far in any CoD, ever.
Edit: sorry, it's already been said whilst writing this.