I have goumi seeds, purchased off a popular internet auction site. Admittedly I have little idea of how to try and germinate them!
I've heard suggested 12-week cold stratification, notching the seed coat, sitting in sterile compost for up to 18 months (!), amongst others! I do intend to try a few ways, see if I can get anything to sprout- as I can't get hold of an actual plant here.