I found Salem Sisters II! It was, as I suspected, hiding out in my computer room. I remembered where I put the fabric and floss for it, too, so now it's all kitted up and ready to stitch.
I've got it safely tucked away in the ottoman in the living room. (Notice how I've made this note to myself in case i lose track again?)
Now that I've found it, I have to get back to the computer room for some fall cleaning. It's been raining and storming off and on all day, so there isn't much else to do.