Backing up your network on a server?

[James Bessemer]

I understand Ning is the server we all use to develop networks. As a company, our biggest worry is "What if Ning's Server Blows up and all networks are lost."
I know there are multiple servers for this to be an unlikely circumstance, but in reality, what would happen if Ning shut down? Our Networks would all be lost.
Is there any program that anyone knows of that allows us to back up or own network(s) as a precaution, just in case? Maybe to run it on our own, rather than thru Ning?

Any thoughts on this, ideas, suggestions, etc.?