In certain quarters of Manhattan these days, it's not unusual to encounter characters that seem to have come right out of a James Bond film: beautiful young Russian girls with revealing outfits and hidden agendas. They're the latest status accessory in New York's power game, the mistresses of the Masters of the Universe. The fact that they're dangerous -- wild, unpredictable, on the lookout for a bigger and better deal -- only seems to increase their appeal. So certain women on the East Side are not seeing their husbands as much as they used to. "How old is your Russian?" one just-abandoned uptown wife asked another not long ago.