ActionWatch.com: "Founded as Accept.com in 1998, this credit card processing company for small online merchants was purchased by Amazon.com back in June 1999. Since, it has been renamed Amazon.com Payments, providing its credit card-processing service, 1-Click Payments, for both Amazon.com Auctions and Amazon.com zShops." Ah-hah. (BTW, AuctionWatch has a whole comparative feature on online payment services.)