Very nice. It would be cool if you could try out api calls from the examples (ala swagger style)
Many amazon servers can't service requests from a browser (due to CORS headers), and all of them require an aws account.
Providing an AWS account that people could use is a security nightmare, and many of the operations have charges associated with them.
If I provide my aws credentials, then he could proxy through his server and request on my behalf, but I wouldn't want to give him my credentials and I might as well just play with the aws-cli which exposes pretty much all of the same calls anyways.
Sounds like a cool project to blog about: in-memory implementation of all AWS APIs.
S3
[A1] https://github.com/jubos/fake-s3
[A2] https://github.com/scality/s3
[A3] http://s3ninja.net/
[A4] https://github.com/basho/riak_cs
[A5] https://www.npmjs.com/package/s3rver
[A6] http://ceph.com/ceph-storage/object-storage/
----
SQS / SNS
[B1] https://github.com/iain/fake_sqs
[B2] https://github.com/yourkarma/fake_sns
[B3] https://github.com/adamw/elasticmq
[B4] https://github.com/p4tin/goaws
[B5] http://stratosphere.codeplex.com/
[B6] https://github.com/unbounce/yopa
----
DynamoDB
[C1] https://github.com/mhart/dynalite
[C2] https://github.com/ananthakumaran/fake_dynamo
----
SimpleDB