sebnod on 24 September 2009
it is 1 million in 2 weeks:
http://www.joystiq.com/2009/09/23/joystiq-live-sonys-tokyo-game-show-keynote/
"10:42AM Hirai expresses pleasure in the many "attractive" PS3 games that have been launched so far, not to mention the ones that are yet to come. A redesigned model and a price cut have shown positive results: Over 1 million units sold in a matter of two weeks following the PS3 Slim launch in September"
