This morning, I took a walk around the block, and, amazingly, remembered to actually LOOK at said tire. Sure enough, there's a big, fat ol' Philips head embedded in the tread, and it's lookin' mighty low.
AAA's been here and gone, the donut is on the car, and I'm about to toodle down to Goodyear to get the real tire fixed.
And I had PRODUCTIVE things planned for today. =P
Addendum: Well, that was fast and (relatively) painless. The tires were six years old, and the guy at Goodyear said that they weren't supposed to patch tires more than five years old -- though he said it in a way that implied that they'd do it if they really had to. However, the tires were six years old, and due to be replaced anyway, so the Grape is now riding on happy new tires.
And now -- onto Productive Things!