How to Sign up for US Cable Chanels Outside the USA?

At launch Cable TV is doing an exclusive partnership with Apple. As a result you will need to sign up using an US iTunes account.

You can either use your existing iTunes account and convert it to a US account or create a new iTunes account. The key here is to redeem a US iTunes gift card. This will enable you to pay for the Cable Channel subscription.
Purchase a US iTunes gift card. You can use this site or search on ebay
Open iTunes on your computer
Once logged in click your name top right and select redeem
Enter the gift card code
Your account will change to a US account and you will need to enter US billing data. You can use to get a US address.