I decided that I would allow myself the Labor Day weekend to work on Maimed God as much as possible and that I would thereafter turn to other projects with more immediate deadlines. As of last Monday, when I put TMGS down, I was mostly (80%) done with the Act III scripting and had done a significant amount of playtesting on Act III as well (maybe ~40%). I've done a ton of bug-squashing on Act III, and the first two-thirds of it is pretty polished.
The last part of Act III is fairly cutscene-intense as the story comes to a close. Once those individual scenes are scripted, there won't be many bugs to hunt down. Overall, I'd say Act III is pretty close.
However, since Monday, I've turned my attention to three projects, two of them non-NWN-related, that I simply must finish before returning to Maimed God. First, I'm going to categorize, annotate, and file the 400+ pictures I took in Europe. I'll make a post with some of my favorites when that's done. Second, I have a round of proposals for my own private business due on September 28th, so I need to knuckle down on that. Third, I have agreed to submit something for Bouncy Rock's Halloween project, and that's due October 13th. My idea is set, and I've finished a fair portion of it, but I'll wait until later to provide further details.
So it doesn't look like much progress will be made on TMGS until Oct 13th (or earlier if I can finish the Bouncy Rock stuff ahead of schedule).