AMEX continues to partner with social media in very interesting ways. Their latest effort “Tweet Your Way To Savings”, lets cardholders sync their AMEXs with Twitter, and tweet special offer hashtags to receive automatic savings at point of sale, no coupon required. AMEX keeps a favorites list here with all current promotions. For example Whole Foods – Sync your AMEX here, tweet with the #AmexWholeFoods hashtag, and get $20 back on your next trip to Whole Foods that you spend $75 or more. Press release with more.