While Coda has been around for a while and is great - it looks like this provides a different service. This is cloud based, does your backups for you, and doesn't require that you have your own servers, which reduces maintenance. Code is software - not a "turn key" full solution.
But you are correct, if cost cutting isn't your issue and you wanted a distributed file system that's leaps and bounds over NFS that would be your ticket.
> and doesn't require that you have your own servers
It looks to me like it requires a virtual machine somewhere, which presumably means that you need a server to run one on. There's an FAQ "What happens when I need to migrate to a new server?" which suggests this too.
Although I can't seem to find a summary anywhere of what would be involved in setting this up on your own network.
http://coda.cs.cmu.edu/