The dealer does the right thing
Here's the promised update to the bad auto service call. I took the car back to the dealer last Friday to look at. I was glad I happened to have taken a picture of the passenger seat after purchasing the car--I printed that, as well as new pictures I took of the damaged area, and took printouts with me. The hole in the seat wasn't even an issue; he saw clearly that it was new based on the photos, and they gave me no grief. On the stain, he asked me how I knew it was from the service, as it could have happened any time. I then ran my finger through it, and showed him the still-moist residue that came up with it. That was the end of that; they agreed to repair the seat for no charge.
Repairing perforated leather is far from simple, from what I understand. Our dealer outsources such repairs to a company that comes in once a week, so the car went back to the dealer this morning. When I picked the car up this afternoon, I was duly impressed--although I can see where the repair was made, it really takes a big photograph to make it obvious. From any distance at all, it looks completely normal. Compare the images below; the one on the left is the damaged post-service shot; the one on the right was taken tonight, about 20 minutes ago.
Certainly at that size, the repair is invisible. Click the image on the right, though (caution - huge image!), and you can see the fix. It's not nearly that obvious in reality; the flash and close up really bring it out. I was amazed they were able to repair it that well--especially given the age of the leather seats. They also cleaned it up quite nicely. If I look very closely, I can see just a small bit of remaining discoloration, but nothing like what was there before, and there's no more residue when I run my finger across the area.
So thank you, Beaverton Toyota, for doing the right thing, and doing it well. The fact that they have a to/from free shuttle service made taking the car back about as painless as possible, too. Fun fact: the shuttles (Toyota Sienna minivans) serve a 10-mile radius, and they have two of them. Through September, they've racked up a total of 65,000 miles doing nothing but short local-hop round trips!