In case you're looking for a Russian version of 'fiscal cliff', Alexei Mikheev has just posted a suggestion that I second:
фискальный обрыв [fisk´al'ny obr´yv]
Обрыв is another word for cliff with the added meaning of 'sheer drop.' So it fits just right with what is in the centre of the news from America.
Tetradki have already recommended Mikheev's Dictionaries of the XXI Century site and the Dictionary of the Year page on Facebook. (read here).