Just what we need!
More reasons for aviation authorities to tell us not to use cell phones on planes.
But seriously
people like to complain about not being allowed to use cell phones on planes. If one person were using a cell phone, there's absolutely no effect it would have on the plane. On the other hand, I might see it as plausble that there might be some small amount of interference if EVERYONE were using their cell phones on the plane at once.
This one time, my wife was reading her Nook on a plane, when some guy said to her that she was going to crash the plane with that thing on. I told him he should learn how these things work before opening his mouth. He just looked away. I'm guessing he didn't expect anyone to stand up to him.
Let's just say, for the sake of argument, that something like an iPod Touch might cause trouble if it were transmitting, searching for a wifi signal (although I expect it's completely passive while scanning). A Nook or Kindle, the ePaper models, are basically as OFF as they can be while you're reading a static page. The eInk requires no power at all to maintain an image. And then when you hit the next-page button, for a brief instant, it's using a tiny amount of power to refresh the display. Wifi (this one is not 3G capable) isn't even switched on unless you ask it to do something that requires it.