Update: American Express is now offering Shoprunner for free indefinitely if you enroll at ShopRunner.com/AmericanExpress and agree to keep your AmEx card as the default payment method for their Express Checkout feature. You can still choose to use another credit card for any specific purchase. I didn’t see this as a big deal as in May 2013 they already offered a year-long subscription for free, and who knows how long Shoprunner itself or this AmEx partnership will last.
Shoprunner is similar to Amazon Prime in that it offers unlimited free 2-day shipping with no minimum order amount from a variety of online merchants including Newegg, Babies R Us, Blue Nile, Sports Authority, Drugstore.com, and GNC. It also allows you free return shipping and the ability to ship to any address, making it handy for gifts. You can also get free delivery from Domino’s pizza.
You’ll need a consumer or business American Express card issued by an AmEx-affiliated bank (Starwood Preferred yes, Blue Cash Preferred yes, Business Gold yes, Costco yes, FIA/Fidelity no, Citibank no, prepaid versions no).
I’ve used my free membership a few times to send gifts from Babies R Us, although I wouldn’t pay $79 a year for it.