As you may be aware, Amazon does actually already make it easier for you to shop at places other than Amazon.com with its AmazonPayments service, and it now looks like it might even be thinking about expanding things to brick and mortar stores as well.
Examples of the services offered by Amazon Web Services are Amazon Elastic Compute Cloud (Amazon EC2), Amazon Simple Storage Service (Amazon S3), Amazon SimpleDB, Amazon Simple Queue Service (Amazon SQS), Amazon Flexible Payments Service (Amazon FPS), Amazon Mechanical Turk and Amazon CloudFront.