A link from Are there any man-only places in the world? called No Women Allowed by Fox News repeats a claim I've often heard:
Women need a man, or government permission, to do just about anything – Saudi Arabian women aren’t even allowed to drive.
By contrast, Wikipedia claims the situation is not as clear cut as that. And I'd be more inclined to trust Wikipedia than Fox News!
What is the situation of women drivers in Saudi Arabia? Is it legal? Is it illegal, but tolerated? Also, is it only Saudi Arabian subjects (or those that the government regard as Saudi Arabian subjects) that driving restrictions apply to, or does it apply to foreign visitors who aren't Saudi Arabian subjects?