Ok, the jury is in for the low-salt jerky marinade - it's a keeper. I used the following recipe, but I used cider vinegar instead of wine vinegar, I went light on the vinegar, oil (peanut), and catsup, and increased the salt to 2 teaspoons. The first piece I sampled was a bit strange as I was expecting salt to be the first flavor (even though I KNEW there was little salt in it), and the first flavor I actually experienced was the vinegar. It's very light. After three pieces, I thoroughly enjoy the mix (1st piece strange, 2nd piece tasting, 3rd piece liking). If you have a problem with salt/sodium, this is a good way to go. I think I'll use a peppered vinegar the next time I make it.
1/4 cup water
1/4 cup wine vinegar
1/4 cup sugar-free ketchup
1/4 cup Worcestershire sauce
1/4 cup olive oil
1 1/2 tablespoons xylitol
1 tablespoon liquid smoke
1 tablespoon onion flakes
1 teaspoon salt
1 teaspoon pepper
1 teaspoon oregano
1 teaspoon garlic powder