October 13, 2010
Thats easy, the one they don't serve anymore which is the Captain Morgan flavor. They had it about 6 years ago as a promotion and then when it went away, they never brought it back. I can still vaugely remember it's taste being a sweet but not sugary flavor.
For their main selection of wing sauces I would go with Teryaki or Honey BBQ which was also at one time a promo sauce.