I'm so international! Yes, your Starbucks card works in London, England. This is a U.S. card, used and reloaded in London with GBP.
18 more drinks to gold status! I'm rocking an ancient Red card.
Pick up a new card here:
You can add that value to your current card.
I've gotten over $200 in cash back from them at places I would have shopped anyway! Ebay, Staples, more! I put it at the top because they ROCK. Basically, you get a kickback from Ebates when buy.com or whoever pays them. Win-win. If you like throwing money away, don't use them!