I guess this will be an entirely different league of server.
You can probably even build something like this with some half-clever load-balancing or data mounting/routing. Then again… only replicating the media will do you little good as the streams will still run through your server (NAS->PMS->client; not NAS->client).
There’s been a similar request in the past (not the same) where a user was asking for an option to sync the databases between their servers. They were then planning to access their different servers (each with a redundant and fully synced set of libraries).
