"If New York City is a business, it isn't Wal-Mart -- it isn't trying to be the lowest-priced product in the market. It's a high-end product, maybe even a luxury product. New York offers tremendous value, but only for those companies able to capitalize on it." -- Mayor Michael Bloomberg January 2003These seem the best of times for America's elite cities. Wall Street's 2006 megabonuses created thousands of instant millionaires, and, with their venture-fund soulmates in places like San Francisco, Boston and Greenwich, the best people are prowling for Ferraris, planes, multimillion-dollar condos, the newest $200 lunch place and the...