Thanks for the comments everyone!
Here's some wire images. I've elongated the torso, as compared to a few reference images I have, her torso seemed too short. I've also tweaked little things here and there. The arms are still very much new.
I'm pretty sure that I'll eventually model the entire thing, but for this challenge, as there's a time limit, I'm only going to do what's needed for the image. Actually, I've already done quite a bit more than I really need, as most everything under the breastline will be hidden. :p