Re: Distributed backup?
Its still relatively new, and has a (few) bugs, but is cross platform compatible and runs through a ssh tunnel.
Simply, it works like dropbox (except that Dropbox uses S3). Files copied/moved/placed in the SparkleShare folder are sent to the server via ssh. As you have multiple clients connected, it works just like dropbox - the clients are synced with the server. For example, if a file is uploaded on computer 1, it will go into the server, then will propagate to computer 2, 3, and so on.
Don't waste your energy trying to change opinions ... Do your thing, and don't care if they like it.