Yesterday the beta of the Amazon Web Services (AWS) SDK for Windows Phone was released, making the Amazon S3, SimpleDB, and SQS Cloud Services directly available to Windows Phone 7 Developers via C# APIs. The SDK is published as open source code under the Apache 2.0 license.
Why do this? Microsoft designed Windows Phone to be a Cloud-friendly phone across vendor boundaries. There are various Cloud platforms available on the market today and Windows Phone developers should be able to efficiently and rapidly get their Windows Phone applications connected and integrated with the Cloud services they want.
This release is aimed at gathering feedback from the developer community to deliver the right support in the SDK. The Windows Phone team is keen to improve it and deliver the right features based on the feedback.
Developers can download the SDK , along with the complete source code under the Apache license. A Getting Started guide can be found on the Windows Phone Interoperability Bridges site along with other resources.
Windows Phone Porting resources and API mapping: