When you make edits, they appear within a week, making the map potentially the freshest world streetmap by far. That gives the community vibe of practical participation - wikisquee - and means that a handful of individuals can have a mapping party and get their area lovely (whether that's Devon, Faro or Gaza - there are UN staffers out there with GPS and bicycle mapping suburbs so that aid can be distributed).
My Garmin GPS MapsI like contours on my maps, so I've combined the OpenStreetMap tiles with the Scottish Mountaineering Club's topological tiles to give a Garmin GPS map of the UK and Ireland with both.
There may be two files for a date. The one with "BRIGHT" at the end of the name is built using a very colourful style sheet. It's a love/hate thing; if in doubt, get both.
The OSM map tiles and stylesheet are compiled by OSM user ComputerTeddy.
Born SlippyThis is the "slippy map", the OSM main web map:
You can drag it around, zoom, and generally have fun.