Reviving this thread. I brewed this on Friday, and followed the recipe, minus the Fuggles (used Magnum instead -- the textbook bittering hop), and I contained the coffee and nibs within a 1gal strainer bag which I steeped and squeezed for 8 mins after flameout before removing. Used 100% cacao baking bitter chocolate (from Fresh Mkt).
I took a sample after about 50ish hours and it tastes absolutely delicious. Now, that being said, I don't notice much coffee flavor, but again, I brewed it Friday afternoon so that may take some time. I definitely could taste the roasted and choc malts, as well as the chocolate itself. I expect after primary, that the coffee will come through a bit more. Plus, there's coffee to add at kegging anyways. It's going to be absolutely amazing, I can tell.