Many recent articles in the media are speculating about the role of Microsoft boosting OSM vs Google. One of the facts reported is saying that "Microsoft donated map data to the project". I've seen this first in the NYT http://www.nytimes.com/2012/03/20/technology/many-sites-chart-a-new-course-as-google-expands-fees.html?_r=1
(and blindly repeated in other mediums like PCWorld : http://www.pcworld.com/article/252649/microsofts_secret_weapon_against_google_maps_open_source.html
I'm just wondering if Bing aerial imagery can be considered as "map data". It needs a considerable amount of work to be converted to vector data and attributs, the real value of OSM "map data". It is just very irritating.