Microsoft interoperability team has released Amazon Web Services (AWS) SDK for Windows Phone which is in beta and its a part of Microsoft‘s open source project. This SDK will help developers to quickly integrate Windows Phone apps with AWS (S3, SimpleDB, and SQS Cloud Services).
According to Director of Business Development for Amazon Web Service:
“Our approach with AWS is to provide developers with choice and flexibility to build applications the way they want and give them unlimited storage, bandwidth and computing resources, while paying only for what they use. We welcome Windows Phone developers to the AWS community and look forward to providing customers with new ways to build and deploy Windows Phone applications.”
You can also find Getting Started guide with AWS on Windows Phone Interoperability Bridges site.