I am trying to do the same thing. I am monitoring my whole network with SMS notifications and I can't afford the Dude to crash and then not have a back-up. Also the back-ups are to big to email, so it needs to be transferred to a remote server(probably Linux) via FTP or something.
I really thought there would be a option for this somewhere on the Dude, but it turns out there isn't
For now I am left with manually backing it up and then copying it to the remote server
This would REALLY
be a great addition to an already great program.