Ending today, ShopRunner
via Domino's on Facebook offers One Year of Unlimited 2-Day Shipping
when you Like its page. That's tied with yesterday's expired mention as the best deal we've ever seen for this shipping service. (For further comparison, it's $30 below its Black Friday offer.) Vendors that use this service include Toys"R"Us, newegg, Lord & Taylor, Calvin Klein, RadioShack, drugstore.com, and more.
Note: Be sure to cancel before your 1-year subscription is up or you'll be billed for another year at full price, currently $79.