I used to get motion sickness from playing Portal... I was lucky enough to have a friend who let me watch him play the whole game. I don't get this feeling with mounts, but I don't have the camel so I wouldn't know this pain.
I know what you mean! Bought the Camel of Ill Omen (If I got the name right) and as much as I wanted to use "Dusk" a lot...
I get terribly sick (The dizzy way - not the criticizing way) watching my character go up and down... up and down... up and down.....