PlayAsia has these shipping now and these are the Asia region but have the English voice acting and subtitles. No region protection so they will work on your US PS3 and or 360.
Xbox 360 - $44.90 + $3.90 S&H
http://www.play-asia.com/Warhammer_40000_Space_Marine/paOS-13-71-dw-49-en-70-4b8k.html
PS3 - $49.90 + $3.90 S&H
http://www.play-asia.com/Warhammer_40000_Space_Marine/paOS-13-71-bp-49-en-70-4b8l.html
PC - $42.90 + $4.90 S&H
http://www.play-asia.com/Warhammer_40000_Space_Marine_DVDROM/paOS-13-71-7s-49-en-70-4cgd.html
Xbox 360 - $44.90 + $3.90 S&H
http://www.play-asia.com/Warhammer_40000_Space_Marine/paOS-13-71-dw-49-en-70-4b8k.html
PS3 - $49.90 + $3.90 S&H
http://www.play-asia.com/Warhammer_40000_Space_Marine/paOS-13-71-bp-49-en-70-4b8l.html
PC - $42.90 + $4.90 S&H
http://www.play-asia.com/Warhammer_40000_Space_Marine_DVDROM/paOS-13-71-7s-49-en-70-4cgd.html