Store per-user setting for your web site

Application Based storage is an experimental API that allows application developers to store a small amount of state/configuration data in the Windows Live data centers on behalf of a user. This API has an AtomPub service end point so developers will be able to call this using ADO.NET data services or other AtomPub compatible tools. The real value kicks in here if an application was to have hundreds of thousands of users as the client bandwidth and storage are offloaded to Windows Live infrastructure.