Nice post. For a second there, I thought I was going to have to argue that it is not an oxy-moron lol
I'd also add that an anarcho-communist society/commune/etc could exist within the framework of an ancap society. Conversely, an ancap group would have to be ejected from an ancom society.
Much like a parasite can live within a host, but a host can not live within a parasite ;)
Your second point is very astute. I'm going to get into that a bit with tomorrows post.
Cool. Looking forward to it.