Just to bring this one back up.
Just got a copy of The International on blu ray as I found it cheap, and it comes with a digital copy.
Now, its a Sony disc and it looks like they have finally woken up and smelled the coffee as it is compatible with PSP, PC, Mac and iPoo.
I wasnt sure it was applicable anyway due to the possibility of this being a used copy, and not sure if these are one time user codes, and I also noticed that the small print said it had to be redeemed by 8th July this year. (although further on in the small print it says that the code may not be redeemable after this date.
Anyway, I just tried it in the name of research (not Townshend research) and it works.