John Robb suggests that al Qaeda may be trying to disrupt the oil supply to create a massive shortage.
Saudi security building bombed. Senior security official killed. This marks a major change in strategy. Regime destabilization is underway. A potential al Qaeda strategy: continue attacks on Iraqi oil production (which have been very effective given how few attacks have been made), extend political dislocation to Saudi Arabia (this attack marks the start of that), and reduce Saudi oil production through disruptive attacks (watch for that over the next three years). The goal: keep Saudi oil production at stable or decreasing levels. Rapidly growing global demand will create a massive shortage in short order. Think systems and networks.
Park those Hummers!