The ETA, a Basque seperatist group, has adopted global guerrilla tactics. Last week they disrupted energy exports from France to Spain by bombing a high voltage power line. 
France is a major power exporter, and operates two 400 kV lines and two 220 kV lines that carry power into Spain. This week, the ETA placed two more bombs on these power lines. A warning to the authorities allowed them to find one device, they are still searching for the second (there is one conduit on each doast and one in the middle -- see diagram. The likely target is on the western coast.).
In addition to the ETA, Nigerian guerrillas are moving towards global guerrilla tactics. Alhaji Dobuko, a warlord and muslim convert who admires Osama bin Laden, has directed his group (the Niger Delta People's Volunteer Force) to attack oil infrastructure (or oil industry personnel) in order to put pressure on the government. His threat is puts at risk 1-2.5 million plus barrels a day of oil and is largely responsible for driving the price of oil to recent record highs.
Global guerrilla tactics are not restricted to Islamic groups or the Middle East. These tactics can be exported. The focus of these efforts: increase the financial costs of ownership (of the Basque region or the Niger river delta) until it cannot be sustained. Also: disrupt daily life for as many people as possible.