From what I've been reading, it's only hardy to zone 6 so I'm thinking you will be growing this in a container? If that's the case then no need to wait. Most seeds with oily germination inhibitors are eaten by animals (the fruit) and passed through the digestive system in which the acid breaks down the inhibitors and weakens the hard seed coat by the time they um .. come out the other end. They can be soaked in hard cider (alcoholic and very acidic) which will cut the oiliness faster than soap I think for 48 hours then planted - they still take forever to germinate though so I hope you are patient. You might take half your seeds and do the soap thing and the other half with the cider - see which germinates first.
