It's Alive! Or Ten Miles and a Six (er, er, What Comes After Six?)-Pack Later
Or, actually, It works!
A follow-up on the how-to-fix-a-flat-when-you-don't-have-anything-to-fix-a-flat-with stuff: Not only did the knot in the tube get me home the day before yesterday, but, two days later and no air added, it still has enough air to ride. This knot-in-the-leaky-tube thing is too cool to be true.