Up today at the Sobel Wiki are two more For All Nails vignettes. First, #37: "The Candidate" by Noel Maurer, in which we get our first glimpse of presidential candidate Immanuel Moctezuma in September 1971. Second, my own #164: "Under Heartbeat City's Golden Sun", in which a popular music act performs in Manitoba in August 1975.
"The Candidate" was first posted to the soc.history.what-if newsgroup on 20 December 2001, and "Under Heartbeat City's Golden Sun" on 7 November 2002.
And heck, here's an embedded video of the Cars' "Heartbeat City" from 1984.