Just going to add here (and I'm sure to sound like a broken record)...
MythBusters on the Discovery Channel did an episode on sea sickness cures, etc... they tested sea bands, even the mre expensive watch apparatus ($100 I believe) it had no impact - they tested the otc meds, some did an ok job... the surprising cure - Ginger!! They didnt think that would work at all - and they felt it did better than the bonine/dramamine!!
You can buy ginger ale, ginger snap cookies, crystalized ginger candy, ginger altoids, and at the health food stores (like GNC at the malls) ginger capsules (which I use!)