OK, so cabbage tasting is good. Texture might have lots to be desired though. I would try it. Other possible uses hopefully are being looked into. Chicken feed possible one would hope.
Well, like kelp. :) Best places to try to use your local Japanese or Korean restaurant. I personally not say that it taste much like cabbage, more like other kind of seaweed.
One kind is very commonly eaten in Japan. I personally love it.