Well, I made it through my surgery yesterday. It went better than the plastic surgeon expected, even :)
Details for the not-so-squeamish:
They replaced the tissue expander with a saline implant after removing a bunch of scar tissue that was causing the area to be very hard. It feels much more natural now! And there was so much scar tissue there that when it was removed they were actually able to go with an implant bigger than the amount I'd been expanded to. This means they didn't have to reduce the other side very much at all, and it appears to be a D or DD cup. Hard to say before it heals, though.
The only problems I have is that the Norco's not helping my pain much, and I have a drain on the right side that is leaking a lot and not really working so well. I'm waiting for a call back from the nurse at the surgery clinic to see what I should do.