OMFG! I've been hoping for THIS exact technology. I wanted to set up dropbox like environments on all my machines so I can share unlimited data across my LAN this way every single machine acts as a back-up for every other machine on my entire lan set up when it comes to data I very much care for (My Documents, All my photos, etc.) Its not much, 20GB total? If that much. I can even have some machines mirror that to external drives. The idea though is to have them all usable from anywhere and backed up via LAN. Yea so this sounds great.
If we don't need a "server" or do but all machines are servers just one is considered the gatekeeper, this is perfect. Just install everywhere and go.