[jasonlotito]

> I've moved my Apple account between 3 countries now - while I can't update some apps through iTunes, the updates are always available on the devices themselves

How did you set this up? For me to download an app from another country, I need to log out of my current store and log into the other one. It's annoying, and causes problems.

> The Mac App store is a bit different - you cannot redownload apps purchased on another country (so when I reinstalled Mac OS and needed to install iPhoto, I had to revert my account to the previous country).

That's how it works on iOS. You just need to log into the other account. That it's on a desktop just makes it easier.