I'm happy to report that I finished the Sizzler in 54:33 (an average of about 8:47 per mile). If the same rules apply to next year's Peachtree as this year's, today's results should qualify me for a "time group placement", meaning that I won't start in the back of the pack. My next goal is to run a 10k in 50 minutes, so maybe I'll speed up even more between now and next July.
I have posted my personal GPS track here. My GPS seems to think that I went a shade further than the official length of 6.21 miles, and so does GoogleMaps, and so does my car's odometer. At least the race organizers and I agree on my finishing time, which is all that matters. I can only tell you that it felt like a million miles, and it took everything out of me. Readers who are marathon runners continue to have my utmost respect (though increasingly I question your motives and sanity).
My Oscar Moment: I'd like to thank my parents (immortalized here in this must-see portrait), who came out and cheered me on, and my wife, who not only was the most enthusiastic fan on the course - baby in tow - but has made all my athletic growth possible over the last five months.