I noticed the spate of iPod hacks. I have another semi-hack. I keep some family pictures on my iPod nano, which can't show movies. This is very useful for occupying my 2 year old in the doc's waiting room by showing him pictures of himself. This is worth mentioning (as a distinct hack from the video hacks) because it a) can be done with the cheaper ipod b) works without the headphones (good, because my headphones don't fit his ears) and finally c) works for either a longer or shorter amount of time (rather than in units of a whole show).
Related: The spate of iPod hacks