See the update-motd man page for more options available to update-motd.

The Debian Package of the Day weather article has more details about using the weatherutility.

See the etckeeper site for more details on using etckeeper.

The etckeeper Ubuntu Wiki page.

For the latest news and information about bzr see the bzr web site.

For more information on screen see the screen web site.

And the Ubuntu Wiki screen page.

Also, see the byobu project page for more information.