With almost 600 million users on Facebook, it's no surprise that stores all over the Internet want a piece of that type of user reach. Shops went from simply having a fan page on the social networking site, to having actual products for sale, using the Facebook development platform. Services like Payvment have has been used by over 40,000 users and businesses to sell goods on Facebook. Now, Amazon is joining the crowd with some of its third party sites like soap.com, diapers.com, beautybar.com, and more. Users of Facebook will be able to buy goods using their existing accounts without ever leaving Facebook.