chocolate flavored rum

last year @ aloha we had some chocolate flavored rum--delish!! anyone have ideas for recreating this rum recipe? i know natalie added hershey's syrup, perhaps something with a bit of coconut as well--any suggestions before i begin experimenting? thanks for any help! <img src="http://www.traveltalkonline.com/forums/images/graemlins/Thumbsup.gif" alt="" />