Microsoft Sync Framework is a comprehensive synchronization platform enabling collaboration and offline for applications, services and devices with support for any data type, any data store, any transfer protocol, and network topology.  These guys are putting together an initiative called Project Huron wherein early adopters can kick the tires on cloud based data storage and access for free. 

Project Huron is part of Azure, and its goal is “to remove the typical complexities (configuration, scalability, security, etc) involved with sharing database information between local databases such as SQL Server and SQL Compact and provide simple UI tools for configuration and sync components developers can embed in existing applications,” according to a blog post by Microsoft.

To check it out – just go here:  http://www.microsoft.com/azure/huron.mspx