Instead of just looking at the price of oil how about looking at how oil is traded - the USD, OPEC, etc.
For starters, the US has lost a third of its value relative to a basket of other major currencies since the beginning of 2002:
http://ftalphaville.ft.com/blog/2007...alling-faster/
Oil producing countries are gradually switching from trading in USD to EUR - Saddam did it and Iran and others are doing it.
This will be economically devastating for the US, since a strong dollar is the only safety net for its huge debts (upto $60 trillion with the current spending commitments). It's also notable that countries like China hold massive USD reserves and could deliberately devalue the USD if it so wished.