Activision has put its Modern Warfare 3 Content Collection #1 on PSN for any and all subscribers to buy.
The skinny on what's in there from Activision: "Content Collection #1 includes the brand new multiplayer maps Liberation, Piazza, Overwatch and Black Box along with new Special Ops Missions Black Ice and Negotiator, marking the first time Special Ops has been made downloadable online in the franchise’s history."
It'll set you back a tenner.
No real word on the PC version, just a note saying that information will be "coming soon".