[ifoundthetao]

I solved the same situation by making a git repo of my rc files.

It's nice.

One thing to keep in mind is to have it look for local files/scripts to source too. That way you can keep per-system tweaks out of the global runtime configuration.

Also, passwords. Don't put passwords, or anything you don't want leaked in the rc repo. You could have it private, but that's not fool proof.