I saw this recipe floating around on some of the fermenting forums and sites I read. It's not fermented per se, but it feeds in to my need to have all kinds of questionable bubbling brews on my countertop. It's basically milk, citrus fruit, vodka and sugar. Let it sit, shake it from time to time and in 10 days strain it. I did mine with vanilla vodka and oranges. The result is a rich, creamsicle flavored liqueur of maximum deliciousness.
Here's the recipe I used: