I did a little research online to find the so-called "International Investment Position" (IIP) of several countries. This number is equal to the total public and private international assets a country has, minus its total public and private international debt. In the following table, I converted the numbers for each country's IIP at end-of-year 2008 into US Dollars, using Google's currency conversion. Then sorted it by IIP per capita:

The figure for the U.S. is not nearly as bad as scaremongers would have you believe when they discuss only the debt figure. However, I don't have the slightest idea how Australia is going to dig themselves out of their hole.