Does it have a dry finish?
Definitely. Dry, and it puts emphasis on the malty qualities. When I made my oatmeal stout with it, a few people said I should enter it in competition.
I'll have to give this a try when i get my additional carboys.
so, the consensus seems to be that powder is what to use, not semi sweet morsels melted down?
I preach the virtures of cocoa powder, yes. The oil in the morsels or baker's chocolate will cause nothing but grief.