Scared?

Robert Parry at consortiumnews thinks that the resignation of Turki al-Faisal as the Saudi ambassador to the US was a softening, on the part of Turki, to what amounted to a recall of the ambassador:

The unceremonious departure was seen as another signal of Saudi anger over Bush’s regional policies. In that view, Turki’s resignation was akin to the recall of an ambassador between two hostile states, albeit softened by Turki’s insistence that he was leaving to spend more time with his family.

If correct, this adds weight to the perception that the Saudi's are really frightened by the latest maneuvers from the US administration. Withdrawal of an ambassador is traditionally the step before a declaration of war.