Fermented milk products are allowed on low-carb. Plain yogurt, for example, only has 4 net carbs per cup because of the fermentation. I just ignore what the label says and count 4 (and eat it every day). For this same reason the Dannon flavored yogurts with Splenda are also okay.

One of my favorite treats as a kid was plain yogurt with Grape Nuts. I found a fairly low carb soy cereal that has the same "mouth feel" as Grape Nuts, and now I can have my childhood favorite again.