And what it means to our buddies in Russia, Iran, and Venezuela:
http://www.iht.com/articles/2008/10/21/news/21petro.php
"As the price of oil roared to ever higher levels in recent years, the leaders of Venezuela, Iran and Russia muscled their way onto the world stage, using checkbook diplomacy and, on occasion, intimidation.
Now, plummeting oil prices are raising questions about whether the countries can sustain their spending  and their bids to challenge United States hegemony.
For all three nations, oil money was a means to an ideological end."