That made a trace, which ended up in the 'moko in ~/Maps (which is itself a link to my microSD card's FS). I copied that to ~/tmp on my desktop.
Following this page I downloaded the converter to ~/openmoko/convert2gpx.pl and ran
~/openmoko/convert2gpx.pl 20090810_080818.log > 20090810_080818.gpx
Ran josm with
java -jar ~/bin/josm.jarand used Open
to open my track. Then also used
Download OSM Data
to get
the existing OSM data for my area, using shift-click-drag to open a slightly bigger
rectangle on the map so I could get both Sedgwick and Cavendish Streets to make sure that I
connected both ends of the alley.
Used the node-connector
to tag the three
legs of the alley, pressing ESC after the last leg to dismiss the
floating arrow.
Then used Select Move and Rotate Objects
to select my
new track, using Presets I
tagged it as Streets -> Service, with a surface of "concrete" (as suggested by this page in the wiki).