yougnome allow to backup all things relative to Gnome on your Linux Machine ! it backup them in a single .tar.gz file, then restore them any time you need.
New! : yourgnome2 is now available !, and with a GUI !
Download: yourgnome version 2 with GUI
Documentation: How to (Install & Use) yourgnome2
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by yourgnome you backup the following:
1- all your themes.
2- background you use settings.
4- gnome-panel settings.
5- bluetooth-manager settings.
6- evolution settings.
7- file-roller settings.
8- gnome-screensaver settings.
9- gnome-session settings.
10- gnome-terminal settings.
11- gnome-volume-control settings.
12- metacity & compiz settings.
13- update-manager & notifier settings.
14- totem settings.
15- network configuration set by Gnome.
16- screenlets !
And, many more .. !