I've wanted to try this for a while - flavoring a stew with Cola. It was awesome with lamb shoulder. I substituted half-Cola for the stock I'd usually use to cook cous cous and the meat, after slightly roasting to give it color.
Lamb went very well with the tart cherries, raisins and figs I added. Perfect for a snowy night's dinner. Now I may actually consider having soda on hand for occasions like this. Just need to find a good hiding place from some people :P