Windows 8 have this feature to backup the server to the cloud. Until today there was not so much information about that except that the data will be backed up to Azure storage. Thanks to Technet blogs we now have more information on the matter. I think the most interesting feature is that third party companies can develop their own Online Backup solution by using API. Click on the link and learn.

http://blogs.technet.com/b/windowsserver/archive/2012/03/28/microsoft-online-backup-service.aspx