Fantastic! I hope it allows rollback to an earlier version of the entire filesystem, too. I know people who have lost large amounts of data on Dropbox because some client-side issue (malware or just plain error) deleted everything. I think they also had some online backup service that could roll back files but only if the file was still there, which is useless.
Will you also support deduplication (files, blocks, context-aware blocks, or otherwise)?
Will you also support deduplication (files, blocks, context-aware blocks, or otherwise)?