I had some success easing morning sickness with ginger, although by the time it was done, I couldn't stand anything with ginger in it! That taste still takes me back to those days of feeling terrible. Blegh.
This time, B6 has been doing wonders for me. Really made a big difference. I hadn't heard of it before, otherwise I would have tried it with the others.
I've heard some people say eat whatever appeals to you, no matter how weird or wonderful it is. (Provided it's safe for pregnant ladies, that is!) Pickles, salt and vinegar chips, baked potato, sour candies, whatever. If it helps, go for it!
Hope you find something helpful soon - it's such a lousy time!