My recipe for the smoothie needs some work, but I think that it will be good after some refinements. Yesterday I added yogurt and sugar. The yogurt added some tartness, which it did not need since the cranberries are already tart. Next time I will try a bit of heavy cream and more sugar. Usually sugar + cream + fruit is a good combination. I think that this will turn out to be sort of a dessert drink.
Now if I can find the ice cream maker I could try that as well. I wonder if I could make it into a sorbet? Here is a sorbet recipe that includes cranberries: Triple Berry Sorbet I would have to adapt it to work with lees, but at least it gives me some ideas. Time to experiment on!