Thanks for the tip. I downloaded JOSM, and on looking for my track on my GPS, found out that the 'OK' icon doesnt do what the 'Enter' key does for save track file dialogs. Oh well, another day went by gathering home-office-home tracks. It was well spent once I loaded up JOSM and opened my track. I'm still finding my way around the interface - currently I am looking for a better way to scroll than finding a node near the corner and re-centering. I saw some missing roads near my office, so I'm all set for a post lunch walk, to record more tracks. I'm still wondering about uploading the tracks as being useful to others, but I'll be doing it soon.