Here are the combos I have tried so far:
lemon cupcakes/rosemary frosting (HUGE favorite!)
blueberry jelly filled cupcakes/blueberry mousse frosting
strawberry jelly filled cupcakes/basil mousse frosting
coconut cupcakes/cilantro frosting
apple cupcakes/cinnamon frosting
pumpkin pie cupcakes/whipped cream frosting
lavender cupcakes/chocolate frosting
cranberry cupcakes/hazelnut frosting