Recent rankings of most expensive cities?

Anyone have a recent, reputable tabulation of top cities in the world for cost of living? We live in NYC and am having a hard time conceiving of a more expensive place on the planet to live. Anyone from London don't bother comparing, I go to LON a lot and if you earn pounds it's still not comparable to this, albeit it's no bargain either. Prices (food, rent, apt. purchase) keep going up-up-up and wages keeping coming down-down-down, this city has been pretty immune from the cost-side of the recession. It is a very safe city now, because the poor have been leaving in droves since they can't afford it here. I think NYC should split off from the US, and issue it's own currency, because NYC bears very little relation any more to the rest of the U.S.