Many prominent retailers from across the globe have signed up for Visa Checkout, an online service that allows shoppers to pay with their cards online or on any device. Thirty-three new merchants have joined in recent months, Visa reported, including Best Buy, Barnes & Noble, Under Armour, Taco Bell and Living Social. The addition of global merchants, such as Canada's Grand & Toy, Australia's The Roses Only Group, and Colombia's Exito.com enables fast secure cross-border shopping. Story