Can you spare an air mile, brother?

Incredible. Frequent flyer miles now have a greater total value than dollars, euros, pounds, or yen.

"By the end of 2004, almost 14 trillion frequent flyer miles had been accumulated worldwide, worth between 1p and 6p apiece.

According to a new analysis by The Economist magazine, the global stock is worth more than $700 billion, more than all the US dollar bills in circulation, and streets ahead of Britain's $42 bilion notes and coins."