So how could you use this idea in your home? I like the "bookshelves hiding a door" idea, like at the 3 Rings offices. We (well, mostly Ben, with some of my help), built shallow bookcases covering one wall of our guestbedroom:
I wonder if we could just extend them somehow to cover the door as well, giving the illusion of a room with no door? (Kind of missing the point, though, doesn't it, to have the hidden door on the *inside* of the room?)
Of course, there's always the hidden door at the back of a wardrobe.
Previous post on the 3 Rings Offices.