I've puddled around with trying to make a decent own dipping sauce for Trader Joe's gyoza, and never been quite happy with the result, but I think having knuckled under and finally added sugar, I may be closer to something like what I was wanting. Here, mostly for my own reference, and that of anyone else who may care, is today's recipe:
Pretty Good Dipping Sauce
1/4 C Soy Sauce
Juice of 1/2 good sized lime
2 heaping tsps minced garlic
1 tsp sugar
1 1/2 tsp Gourmet Garden Ginger Spice Blend (or comparable quantity fresh grated ginger, if you got it)
Whisk all ingredients together. Dip your damn' gyoza. Nom.