Activision points out that the PlayStation 3 has caught up to the Xbox 360, at least as far as Call of Duty 4 map packs go. There's also a bonus:

To celebrate the launch, PLAYSTATION Network will host a Double XP Weekend, where players can earn twice as many experience points as they battle gamers from specific playlists on the new multiplayer maps starting at 10:01 p.m. AEST, Friday, April 25 through 4.59 a.m. AEST, Sunday, April 27.

pfft, WTF is the PC map pack? There must be hundreds of thousands of PC users waiting, but PS3 and Xbox 360 come 1st?? What a gip.

pfft, WTF is the PC map pack? There must be hundreds of thousands of PC users waiting, but PS3 and Xbox 360 come 1st?? What a gip.

They dont have a way to sell the maps to PC users which doesnt result in easy piratability. So theyll milk it as long as they can before giving them to PC users - OR they wont ever release them to PC.

Gay, bring on the PC maps