[Techtaffy Newsdesk]

American Express card users can buy gift Cards and products from Amazon, Sony, Urban Zen and Xbox 360, using Twitter.

This is how it works:

• Sync your cards at sync.americanexpress.com/twitter
• Tweet special #hashtags and look for a response from @AmexSync with the confirmation #hashtag
• Tweet the confirmation #hashtag within 15 minutes of the response from @AmexSync to confirm your purchase. Your product will be delivered to your billing address on file, with a free two-day shipping.

American Express launched its proprietary Card Sync technology on Twitter last March.

[Image courtesy: American Express]