They go out on March 10 2011 for the Call of Duty Black Ops Escalation
Map packs for the PS3 come out a month after they come out for the Xbox.
March 1st
June 10 2011 for the escalation map pack first strike is already out
April 30th for ps3
when it comes out
may 5
march the 3rd
I have heard that the new stimulus map pack for the ps3 will come out a month later than on the xbox 360 which is around April 30th The Resurgence Pack is coming out about a month later than xbox360 and xbox360 comes out June 3rd.
APRIL !
the map packs come out between April 29 through may3
8th of June 2011
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