As mentioned on BoingBoing and in The Guardian, this weekend, OpenStreetMaps is mapping Manchester, a project with the mash-up moniker,”Mapchester”:

Mapchester is a collaborative ‘wikimap’ project, a test case for OpenStreetMap that focuses on one city. It will involve a Mapping Weekender, when Manchester is mapped in a weekend!

Hope we’ll hear more about this project when Steve Coast of OpenStreetMap presents at Where 2.0.