What a coincendence, seeing this thread. I just cut up a slap of my Creamy Dark Chocolate Espresso soap a few minutes ago. I use 100% Dark chocolate in many of my soaps. I'm friends with the owner of a very high end chocolate house, and I use the samples they recieve from around the world. The owner tastes the samples to see if he likes them, and then he gives them to me for my soap. I've always made some sort of chocolate soap, but never realized how wonderful it is for the skin until I helped out at the store. I always noticed how soft and smooth my hands were after working with the chocolate. I've done several techniqes, and today my soap slab "literally" looks like a large piece of dark chocolate.. The entire slab was coated in dark chocolate. When I cut it up, it had a beautiful brown soap inside the dark chocolate outside layer. I've already tested it, and everyone ooo'd and ahh'd. It is sooo creamy soft and soothing to the skin, and the chocolate makes your skin so soft!! This recipe and technique (today) is a keeper.
So don't be afraid of using real dark chocolate in your soap. Just start trying different ways of adding it, and you'll find the right way for you. That's what I did.