The floors are done, hip hooray!
We ripped out that shag and were thrilled to find a beautiful birch wood floor that may or may not be original to the house (1876). It took a solid week to pull out the decades'-worth of carpet staples and even longer to sand off the stubborn varnish that a previous occupant had applied around their area rugs. Once we got down to bare wood, we sponged on a whole lot of wood conditioner, stained with a nice dark hue (Minwax Jacobean), and sealed with a couple of coats of poly. We plan to add a couple more coats in summertime, but 2 days in a hotel right before Christmas was, well, plenty.
Now we're on to drywall, trim, and (finally!) paaaaaaint.