Microsoft Research has made available for download a developer preview of "Windows Phone 7 + Cloud Services Software Development Kit (SDK)".
This is a software-development kit (SDK) for the creation of Windows Phone 7 (WP7) applications that leverage research services not yet available to the general public. The primary goal of this SDK is to support the efforts of Project Hawaii, a student-focused initiative for exploration of how cloud-based services can be used to enhance the WP7 experience.
The new SDK is related to Project Hawaii, a mobile research initiative. Hawaii is about using the cloud to enhance mobile devices. The "building blocks" for Hawaii applications/services include computation (Windows Azure); storage (Windows Azure); authentication (Windows Live ID); notification; client-back-up; client-code distribution and location (Orion).