Your post on the organ at the National Cathedral for today is over at Alice's blog so you have to go over there and see the photos and history of it. I took pictures up close, but they turned out pretty pukey so I deleted all of them.
Alice and the KOH told me to ask if I could play something on it, but I didn't have the nerve to ask. Very impressive though. If you ever go see the Cathedral, plan to stay for a recital with the organ and the history of it.