I'm asked about sugar alternatives so frequently that I figured I should just write a post about the topic. I have no personal experience with using stevia or artificial sweeteners. My husband and I don't care for them at all. My husband has a very strong dislike of stevia in particular. So I've never used it in my ice cream recipes.
However, a little Internet research has led me to believe that you could probably substitute 1 teaspoon of pure stevia (no fillers to bulk up the powder) per cup of sugar in my ice cream recipes. I think that Splenda can be substituted cup for cup (1 cup sugar = 1 cup Splenda). Of course, there are many other sugar alternatives out there, but with a little experimentation, you can probably find something that works for you.
I'd love to hear your comments about what you discover. It will help other readers, too, because I have no plans to abandon my evaporated cane juice (or whatever you want to call it).