A computer-implemented service acts as an intermediary between merchant sites and users thereof, and enables the users to purchase items on the merchant sites without having to create accounts with such sites. A user may invoke the service from a web page of a merchant site, and complete a purchase transaction,...http://www.google.com.au/patents/US8160935?utm_source=gb-gplus-sharePatent US8160935 - Payment service capable of being integrated with merchant sites
