Stumbled on this story today on MSNBC, "Ginger Helps Ease Nausea in Cancer Patients." I can say from first hand experience that the Aurora Brand of Crystallized Ginger is a pure God send (pills and soda did nothing for me). From being sick through my whole first pregnancy, to the everyday problems coming from car-sickness, flu, meds that cause you to feel nauseous, etc.
Crystallized ginger is the only thing that made the nausia go away. Including the meds the Dr's gave me. If you have any issues with your gut at all, I HIGHLY recommend you try it.