Topic: Create and restore file system images
This can be done with fsarchiver. People could use this to back-up an entire file system to a smaller compressed image before altering a partition. It's simple command line interface would make it easy to control through a GUI. GTK+ could easily supply the file save location and retrieval with the code that the gparted_details.htm uses.
This would be one step closer to making GParted the ultimate partition manager.