The fruit isn't edible until the berries turn to a dull purple. I have some that are shiny purple right now. I've read that it is just a matter of a week or two and these shiny ones will be dull. I've also read that the berries' flavor will improve if left on the plant until after the first frost. The pulp inside should turn from green to purple as well.
The berries need to be sweetened with sugar, but make excellent pies and jams (from what I've read). I'm going to attempt a jam. If I fail, I'm not out anything... these seeds were given to me by Burgess Seed co. as a free bonus with my order (perhaps to make up for the dead paw paw and blueberry plants they shipped to me -- I will not be ordering from them again).
Overall, it has been fun to grow the garden huckleberry. I will keep you updated on what I do with the fruit.