found this information on the cnn website today. i thought you might enjoy it. i find it really interesting.

World's most expensive cities 2007
1. Moscow
2. London
3. Seoul
4. Tokyo
5. Hong Kong
6. Copenhagen
7. Geneva
8. Osaka
9. Zurich
10. Oslo
11. Milan
12. St. Petersburg
13. Paris
14. Singapore
15. New York City
16. Dublin
17. Tel Aviv
18. Rome
19. Vienna
20. Beijing

if you'd like the whole article, you can see it here.