Bidirectional synchronisation with rsync

I would like to copy Elka's home directory (/home/eros/) from the laptop (asteroid) to the server (jupiter) and back from jupiter to asteroid as well as from/to jupiter to/from PC machine (darkstar). So the problem is to sync bidirectionally /home/eros/ on three machines.

On darkstar I run the following script (and similar one on asteroid):

#!/bin/bash
# http://wiki.archlinux.org/index.php/Full_System_Backup_with_rsync
#
SOURCEDIR=/home/eros/
DESTDIR=root@jupiter:/public/DELL/backup/rootfs/home/eros

INCLUDED=' --include="/.emacs-local/" --include="/.ssh/" --include="/.emacs" --include="/.bash_profile" --include="/.bashrc" '
EXCLUDED=' --exclude="/.*"'

rsync -av -e ssh $INCLUDED $EXCLUDED ${SOURCEDIR} ${DESTDIR}

# the other way round now
# Cf. http://faculty.wiu.edu/CB-Dilger/s07/rsync-howto.shtml
# Extra slash appended to ${DESTDIR}/ is of uttermost importance!

rsync -av -e ssh $INCLUDED $EXCLUDED ${DESTDIR}/ ${SOURCEDIR}

Adding an exclude switch, --exclude="/.*" excludes all top-level hidden files/directories. Those few which should not be excluded are specified with series of --include switches. Order is important---first --include switches then --exclude switches.