From this Wikitravel site (which seems to have some very useful information): You need to be a member to view our links.

Photography is probably the easiest way for a visitor to inadvertently get into trouble. Do not take pictures of any government-related building (ministries, airports, military facilities etc) or any building that could possibly be one, or you risk being hauled off to jail for espionage. As Saudis place a high value on privacy, do not photograph any Saudi men without permission and do not even point your camera in the general direction of women, period. Even government publications avoid pictures of people and often resort to mosaicing out faces if they have to use one!

Good luck in Saudi Arabia! I hope they're paying you handsomely to go there. My brother lived in a Middle Eastern country for a few years as was not too thrilled with the experience, and where he stayed was a modern, "secular" country not a theocratic autocracy like SA.