I had this experience once long ago. My bro went to States so i kirim him Microsoft Point and LIVE 12 month subscription pre-paid card. To my disappointment and surprise the 12 months LIVE card is region coded. But the Microsoft Point is not. So I am confident that you can use Microsoft Point card purchase from anywhere as long as its not the LIVE pre-paid card.

But on the other hand, this was back in 2006 and i dont know if they already change to rules of pre-paid region coded. But i am sure there's no region coded on microsoft point card..