Recently had the opportunity to try the beta of the new Online Backup from Microsoft.  Presently it is being tested along with the Server 8 Beta, however based on my limited experience with it, I hope they make it available for Windows 8 as well as the existing server products.  It goes head to head with products like Keepvault and Amazon S3.  I think the pictures say it all so check it and if you can, give it try.  They are giving people 10G of online backup for testing.