I've never made candy, but if you have a lemondrop-type recipe, you can infuse it with tarragon, thyme, rosemary, basil, even chili pepper.
For a fruit dip, we've discussed in DC (and I have often made) using simple syrup steeped with peppermint leaves, remove leaves then add lime zest & juice, cayenne pepper. I don't see why you couldn't boil that to the hardball stage. Actually, that sounds really good, I think I'll try it!
I love chili-lime and chili-mango lollipops!