I'm not a Mac person, but I have come to enjoy using the iPad this summer. My husband has helped me learn how to do all of the things mentioned in the videos at the beginning of this summer, prior to me watching these videos. I've already added some free apps related to my content area. I've added Texts from Founding Fathers, The National Archives Document of the Day, and more! From my playing with things, I have learned that we are very limited in certain apps- some let you do very basic things and then require you to purchase an upgraded version to do more. I'm hoping to discover a lot more as the weeks go by and as the students get their hands on the devices.
I agree that a system needs to be in place. We used the macbooks in advisory a lot last year, and my kids took turns on who got to use the computer and when. They all made sure that everyone closed them down and put everything back in an orderly fashion. I plan to make a team of "experts" to help with glitches and depending on the number of devices and which ones I receive, to have them out as often as possible for the students to use for discussion, research, and extension activities. My kids sit in small groups and partners, so it should be fairly easy to put one device out per table.