I was really interested to read this survey in the Times Online about the world's most expensive (and cheapest) cities.
It's primarily based on the cost of a luxury unfurnished two-bedroom apartment in the city. I'd certainly agree on London being high up the list - was curious to see Singapore beating Sydney though. I guess it's a matter of supply and demand, and there simply not being the space in Singapore as there is in Australia.
Much to catch up on this blog! Stay tuned.