GigaOm has a very good report on OSM.
“The crowd-sourced mapping project OpenStreetMap has amassed a million contributors since its inception in 2005 and, according to navigation app maker Skobbler, boasts greater accuracy in England, Russia and Germany than rivals such as Google Maps.”
Sounds like OSM should seriously start considering creating a press reviews page on its website
We have a collection of media reports about OSM in the wiki: OpenStreetMap in the media
The GigaOm link is already on there.