We were introduced to buckwheat at camp, and it is definitely an "acquired" taste...especially in the morning! Buckwheat reminds me of brown rice a little, but maybe more sweet/nutty.
This site has a detailed recipe; I just boiled it pretty much like rice, with a 2:1 ratio, but starting out with the buckwheat in cold water and boiling together. You can eat it as a hot cereal too or even eat it cold in a salad.
I can't call it "yummy" (unless maybe you throw in some bacon), but I feel really good when I feel the healthiness of it going into my body. If that makes any sense.