We have a site where visitors can pay 99 cents for a service. It would be cool if the user experience were similar to iTunes: the user clicks one button, doesn't have to type in credit card info, confirms with another button, and then the transaction is over.
Seems like the way to get closest to this is to support a few different payment services (e.g. google in-app payments, amazon fps) then offer the most suitable one to the user -- the one that makes the number of clicks as low as possible. For example, if the user is logged into Google and has a Google Checkout account, offer Google In-App. If the user is logged into Amazon, offer Amazon FPS.
Any examples of existing web apps that do this in an awesome way to make small payments as frictionless as possible for the user? We need some examples of state-of-the-art solutions, given current payment services.