Oh yeah, I just remembered something. Awhile back I brewed a wheat with a bunch of zest. I wanted a little more kick from it so at bottling, I boiled my priming mix, took it off the burner and steeped another oz. of zest in the cooling priming mix by putting it in a small SS strainer which rested on the rim of the pot.
Worked well and all the flavor and aroma went directly into the bottle.