I would refer you to Jack Keller's winemaking page, since I think he has recipes for these, but his site seems to be down...
Other than that...I'm curious about these as well.
There is one secret ingredient that makes anything better......time.
Primary: House Cider; Carrot Wine. Anchorage Brewing Dregs Cider
Secondary: Rhubarb Wine, House Cider
Tertiary (or higher):
Drinking: House Cider, Cherry Cyser, Belgian Walnut Graff, Rhubarb Wine