GtkSamba is a GUI tool for the Configuration of the Samba,
the SMB file server on X11/Unix.  It will read, edit and
write /usr/local/etc/smb.conf, an alternate configuration
file, or from a network. It uses the GTK toolkit.

This is an early development release, not all functionality
is implemented.  It will let you edit any existing
parameter from a text entry, but without any checking.

http://www.open-systems.com/gtksamba.html