Adam DuVander at Programmable Web ticks off 3 Ways to Style Maps. Which ones? JSON for Google Maps, and CloudMade and Mapbox tools for OpenStreetMap.
Jonathan Bray at PC Pro explains How satnav maps are made describing how Nokia, TomTom, Google and OpenStreetMap gather their data.
Barbara Rodriguez write an AP column about Paper Maps: Amid GPS Boom, Nostalgia Finds A Place which tracks the demise of the paper state transportation map.