In a quick succession of announcements, Amazon released a set of hosted e-commerce payment services, as well as an update to its Mechanical Turk service. The payment service, Checkout by Amazon, will allow online retailers to use Amazon's one-click checkout system, calculate shipping costs and tax, as well as allow their customers to track shipments. The updates to the Mechanical Turk are mostly meant to streamline the creation of new tasks by guiding businesses through the process more efficiently.