Oh and we found this to be new (we recently took our first post 9/11 flight) -- they don't let more than one person to the bathroom at a time. You can't wait outside the door, you have to wait for someone to come out (and then leap to your feet since the rest of the plane has been waiting, too!

) Though we did go in with dd in to help her, and nobody made a peep about that.
Have a wonderful trip!