There's a work around:
1 - Buy a prepaid VISA or Mastercard. They're disposable credit cards with a certain amount of credit.
2 - Sign up to iTunes US. Use a hotel address or of a friend or family member and top up your account with the prepaid credit card.
3 - Log in tv with your US iTunes account.
Enjoy iTunes and tv fully, just like our neighbours.
This looks like a decent way to at least try out the renting concept for people like me that has never had an apple tv before.
Either way though, I mainly bought the apple tv for streaming stuff from my Mac or iPhone, with the interface and integration that really fits together. My xbox and ps3 can stream, but it's no where as elegant or integrated as apples offering.