As promised, here is a picture of the completed Split-Personality Cardigan, with zipper.
I tried--really tried--to get a good picture to show off the colors. But I just can't get good pictures of dark colored yarn. I've tried indoor flash, indoor overhead light, natural outdoor light, outdoor shade with flash, standing on my head, and nothing seems to work. You'll just have to take my word for it that this is prettier in person than in the photo.
As for the zipper, kudos to Zipperstop! They had a wide array of colors to choose from and custom cut my zipper to exactly the length I needed. And I got it three days after placing my order online. How cool is that?