I can't remember from your post about it on your blog--did you read Barbara Kingsolver's book, "Animal, Vegetable, Miracle," yet? Her family faced the same dilemma, when they committed to feeding themselves locally for a year (they pretty much continued after the "experiment" was over, with a little less strictness).
Some things, they gave up entirely, like lemons, bananas, sushi, salmon, and anything out of season. Other things, that they considered staples, they went ahead and put in a supply of, always buying from sources as nearby as possible (even if that was several hundred miles), like olive oil, salt, etc. For coffee, I think they just made sure they purchased from a source that was Fair Trade and sustainable, shade-grown coffee.
I'm sure you've got things mostly figured out by now, and I really respect and appreciate what you're doing. We could never grow enough here to totally feed our family for more than a couple of weeks, but I can commit to buying from local farmers...and I sure can raise a lot of birds!
Belinda