I must say that I have enjoyed reading this story immensely.
I'm a great fan of AU fic and this is well written, plotted and executed. Your characters are well rounded and interesting and I particularly like the way that you have not shied away from making Harry Dark, while still allowing him to be a decent and compassionate man.
I really hope that you find the time to complete this story, I'd very much like to see how it ends.
Great job!