Oh, wow. I had missed that Ask HN. Thanks for making that connection! There are a bunch of cool suggestions in that thread, particularly regarding photography. I can't get over how good photography has gotten on phones.
Did you use any special tooling to handle SMS in this application? I didn't realize that this wasn't open-sourced when you first posted it.
I would absolutely help maintain this project if you ever get bored of it and don't want to maintain it yourself.