pessulus 2.30.0-1 (i386 binary) in ubuntu lucid

 pessulus enables the system administrator to set mandatory settings in
 GConf, which apply to all users, restricting what they can do, which may
 be of particular usefulness for kiosks (internet cafes, for example).
 .
 Examples of what can be locked down are the panels (no changes in the panel
 configuration are allowed, locking their position and their contents), some
 of their functions individually (disabling screen locking and log out), the
 web browser (disabling specific protocols, arbitrary URLs, forcing the user
 to be in fullscreen mode), among many others.