My little brother (osm.org/user/gormur) has bought a GPSr and joined in the effort of mapping Stavanger (Norway). He's already done Stokka (see below), and done loads of linting in the area.

I'v been convinced to try out the desktop editors (JOSM & Mekaartor). Not sure which one I'll end up with, but Merkaartor seems way nicer coming out of the box..