I've been packing today. One perk to the female dress code - scarf + manteau + pants - is that my luggage is a lot lighter.
A wonderful book to read about Iran - All the Shah's Men by Stephen Kinzer. It's an easy read and gives a good look at the history of Western involvement (exploitation) in Iran and how the U.S. toppling of Mossadegh in the 1953 (I think) directly set the stage for the Revolution in '79. Over and over again, our problem solving mechanisms do seem to create larger problems for the future.
Sab bexeir (good night) pronounced saab be'hair with an h like you're clearing your throat.