Attention American Express cardmembers, you are in for a tweet–oops—I mean treat. Starting this week, card members will be able to instantly purchase items from retailers such as Amazon, Sony, Xbox and more by simply tweeting #hashtags. The new “social commerce experience” makes use of American Express’ proprietary Card Sync technology, which allows members who configure their cards with the service to easily purchase select items for discounted prices. Customers can visit the the @AmericanExpress Twitter page and browse a list of available products. See something you like? Simply tweet the product #hashtag then check for a confirmation #hashtag mention within 15 minutes of the tweet, and voila! American Express will send your item with free 2-day shipping. For more information, check out sync.americanexpress.com/twitter.