What's another mile?

I did the last of the long stretch of 30 minute runs in the One Hour Runner program this morning, and then some. I set off on my run and had been cruising along for about a mile when I realized that I never heard the "5 minutes completed" notification from Nike+. I hit the button on my iPhone, which usually gives me time, distance and pace information, and got nothing. I finally pulled it out of my armband and found that I had been running for 8:36 without recording any distance. Rargh. So, I did the obvious thing, which was start the 30 minute run over again. 30 minutes later, I had run 3.11 miles, so today was probably a little over four miles.