Ernest's advice matches mine.
Clean all the crap off them by squishing them in a bowl or 2 of clean water.
Toss the skins, flesh, and floating seeds.
90 days in the fridge, slightly damp but not soggy.
Once you see a few 'pig tails', plant 'em all.
Plan on 50% germination, and 80% survival of those.
Root cuttings are even easier!
Murph
R A Murphy Jr
[NAFEX] amelanchier alnifolia from seed,
Richard MURPHY, 07/05/2011