This is only for Xbox 360 as they get the Modern Warfare 2 DLC as a timed exclusive. Once the PS3 goes live with it then they'll get double-XP.
"Mark the calendars now! April 2nd - 5th marks the first Double XP weekend on #MW2 for #xboxlive worldwide. New Maps + Double XP = No sleep," twittered community man Robert Bowling, reports Eurogamer. Fear not gentle PS3 gamers...
He later added: "Yeah, PS3 will also get Double XP when DLC hits PSN, although that comes later. When it's dated, I'll let you know." March 30th is the date for the Stimulus Package DLC to hit Xbox Live, with PS3 and PC sometime a month later.
Three new maps are added to the game with two brought in from the original Modern Warfare. Have you been suffering mapathy, videogamer? DLC costs 1200 MSP.