Wow Tecmo has just announced Ninja Gaiden Sigma has sold 450 000 units in the world ......that must be a record for the PS3 !!Seeing as Japan sales must be around 70K this week that puts the Europe/NA sales at 380 000 units in one week !!
Links
http://www.playfrance.com/news-infos-450-000-ninja-gaiden-dans-le-monde-631141.html
http://www.play3-live.com/news-ps3-deja-450-000-exemplaires-vendus-pour-ninja-gaiden-sigma-4054.html