I wanted an iPad stand I can use while flying and place on the tray table that doesn't skid. I have the Seskimo Crabble for my iPhone as it's super small and folds. Love it!
I found the following stand at Barnes & Noble for $5. It folds flat and the top wire bar is telescopic so you can raise it higher for portrait viewing or change your viewing angle. The nice part about this one is that it's wide and seems to be more stable than others I've seen.
One issue I found was that it slid around quite easily so I wrapped some non-skid tack tape on the four corners. Problem solved! $1.65 from Lowes if you need it.
Now I can bring along a compact iPad stand in my laptop bag and watch videos in the plane without the worry of my iPad tipping over.
Here's pics of it.
iPad Stand - Imgur