Well I'm not having morning sickness yet, but a girl I work with used to get ginger cubes from a healthfood store. She swore they really helped with the nausea. Just don't bite into them cus they are really strong and would probably make you more nauseous.

No morning sickness yet (though I have been nauseated at times).  One of my coworkers said potato chips actually help, and so do bananas--maybe because of the niacin?  I'd think it would be worth a shot.