Well it seems that the W.L. Lads are slowly inching away with the win. There is still time, voice your opinion!
I just bought a beer made with Yams, yes Yams, called Autumn Maple, from a local brewery called: The Bruery
Autumn Maple is made with: yams (17lbs/barrel, that's ~1 pound/2 gallons), traditional holiday spices, and molasses and maple syrup.
Check out this Bruery and its beers!