It already did.
Map packs for the PS3 come out a month after they come out for the Xbox.
June 3 for Xbox 360
you can download them if you are a premium elite member but you will be able to get it i think for free after the second map pack is available on xbox 360.
it comes out April 9
Yes it was released a month after xbox 360
Fall, 2010
on the XBox 30th March on the ps3 30th April
yes it will come out in June 2009
Aug 23 xbox live september 22 for ps3
The Rezurrection Map Pack is to be released on September 22 2011 for the PS3 and PC 30 days after the August 23 2011 Xbox 360 release.
Must have Xbox live and download from marketplace. The Heroic Map Pack is free and so is the map Cold Storage
The Escalation map pack is not map pack 2 and it was released for the Xbox 360 on May 3 2011 and should come out after June 2 2011 for the PS3 Call of Duty Black Ops the related link says PC and PS3 will be June 3 2011