This article seems to side-step the Bioethics questions. It seems as though giving the treatment may have been unethical, and probably was only performed because it was in Liberia, as opposed to on American soil. I am concerned with the article's early statement, that the treatment"can work effectively," because that does not seem like an appropriate thing to say at such an early point in trials.
It seems kind of like a last ditch effort. According to CNN, the speculation is that the death rate is so high that there wasn't much to lose. It sounds like the doctor was conscious and involved in the discussion to administer the drug to himself and the other victim. It will be interesting to see how this turns out.