I am in the United Kingdom.
My gamertag/account is registered as UK
My 360 is Pal.
My new Black Ops game is Pal.
I downloaded Escalation [EN] the day before the game was delivered (Tues, 31st May).
Now i am trying to download First Strike [EN], and it is not working, because its 'Not avalable to my location' or something, this happens when i try from Black Ops game/Multiplayer area, Xbox.com or normal marketplace.
The map pack has attempted to download (without taking any MS points from me) but stopped at 99%.
If it helps, I have actually played on the Escalation [EN] maps and they work fine.