This page isn"t really updated anymore - check out the source code/newest version at http://techpounce.com/2012/06/01/ubuntu-use-python-to-work-with-archives/
Filesnake is a portable, lightweight and easy to use archiving/backup application written in Python/Tkinter. You can backup (up to) six directories at a time to a single .tar file, as well as restore previously backed-up archives.