I often use my iTouch as a movie/video viewer, and one of the more annoying factors is having to either set the thing flat on the table and look down at it, prop it against something and keep messing with it as it slides down, or hold it in my hand until my arm gets tired. None of these is optimal.
I’ve found two different solutions for this problem. The first is the Crabble Folding iPhone stand. It works in either portrait or landscape mode, and folds flat to fit in your wallet:


The second is the Movie Wedge, which is a wedge-shaped bean bag with a “shelf” that keeps your media player stationery and perches basically wherever you want it to:
You can find more info at the sources.
Source for Crabble Folding iPhone Stand
SourceThe Movie Wedge