The first 2,000,000 to register between 1/26/09 and 3/31/09 will receive a coupon for either a free 2 liter or 20 oz. Diet Dr. Pepper. This is good in the US only and only one request per household. I think there's a good chance you can get in on this deal! Also look in magazines. I've found a couple coupons in different mags. We don't drink soda, but we know people that do!