Well I decided it was high time I started making some actual contributions, notwithstanding the lack of a GPS unit or usable aerial imagery for my area. So I started tracing over the old out-of-copyright map using Potlatch, adding my street and the back streets around Derby that I know.
I noticed the overlay is somewhat misaligned when compared to the existing ways, so I expect that when I do get my Freerunner in the next few weeks and start adding some GPS traces I will have some editing to do to correct what I've entered so far. No matter, at least we officially exist on OSM now.
Having mentioned what I was doing to one person in the office, another colleague piped up that they were also a contributor. I suspect that if I asked around I'd find one or two more as well -- I've noticed GPS traces of the private on-site access roads here, so clearly someone is actively tracing and uploading.