Have been tracing more buildings from around my neighbourhood using Yahoo through YWMS in JOSM. Time consuming but hopefully will be useful in the end. It seems a shame to have a partially-building-ified map but the data could always be hidden if necessary. In the meantime, help on this project is welcome ;-)

Some buildings were hard to see or exactly discern the shape of so I either did my best on those or left them out. Going out "on the ground" to see what things should look like would probably be useful at some point...