Sony announced Wednesday that Amazon will be the first online retailer to sell codes for games and add-ons available in the PlayStation Store. In addition to buying a voucher in-store or downloading directly from the PlayStation Store, PlayStation 3, PSP, and PSP Go owners can now shop online at the world's largest online retailer as well.
Having a digital store has seemed to work for Microsoft and the Xbox Marketplace as users can also use the site to read customer reviews and browse through rankings. Sony has recently increased the number of original PSP games available in the PlayStation Network store, though it doesn't seem all of the newest titles are available yet on Amazon.
Check out the PlayStation Network Amazon store.