http://the-coop.org/poultrygenetics/index.php?title=Dusky - Hey, check this out. Scroll down to the darker chick and 1st and 3rd adult pics. Look familiar?
On the color variety front:
Personally, this coloration/appearance is what I'm working towards with the birchens I'm keeping. It's going to take a while to get there, but with the variability in our genetics in this breed and the tremendous amount of progress seen in just a few generations, I think it's possible to get there without added blood. I am not against adding blood to improve the breed, as far as I'm concerned if it walks, eats, poops, quacks, and looks like a duck, it's a duck and there is no such thing as "pure", that's a line in shifting sands. All life is in transition at all times. However, it's harder to hold to type when outcrossing. I'd like to see where I can get with the IBs I have, and I plan to dabble with some crosses separately.
As to my opinion on where I'd like to see the club go, I think if we try to take on too many varieties, it'll spread us too thin and we'll never get anywhere. I'm not saying eliminate the different varieties, but we need to pull focus on one or two for the APA. That doesn't mean the IBCC can't name/endorse more than that, but for the APA we really need to pick one or two and push them hard. As to the IBCC recognized color varieties, personally I'd like to see us go to Silver Penciled, Gray (or Silver Birchen...though that's a bit of a misnomer since the traditional color variety "Birchen" implies a silver birchen, with "Gold Birchen" applied to the straight up wild type birchen), and Silver Gray for the duckwings.
That's my personal wishes. Obviously I don't expect anyone else to 1000% agree, but just wanted to put my opinion out there. It's a great place and time for discussing and seeing where we want to go as a club.