http://www.time.com/time/business/article/0,8599,1849215,00.html?cnn=yes

"For some countries there is a fear far greater than an economic recession: political turmoil. Iran, which earns 80% of its revenues from oil exports, set this year's budget on the assumption that oil would trade at $90 a barrel � a figure which seemed conservatively low until recently, but which is now above the world price. "If the price stays there a while Iran would cut spending," Priddy says. That might include cutting heavy gas subsidies for Iranian drivers, who have rioted in the past when the government tried to ration gas or raise the price at the pump. Hugo Chavez could face similar problems in Venezuela if oil prices drop below $75 a barrel � the rate at which the country calculated this year's budget. The problems lower prices could cause in those countries could be more visceral than those posed so far by the current financial upheaval."