heck yeah, got sick every time practicing spins in a Extra; got a sick on a hot turbulant day practicing IFR. You get over it. Maybe flight instructors should talk a little more about this so the students don't feel so afraid that they just aren't going to make it and that they are the only ones getting sick.

Oh and the gingersnap idea is a good one. I was watching mythbusters and they found that ginger piles actually help some people with motion sickness