<hr><i>anonymous added on 2010-04-22 18:27:49:</i><br>
Until such time as there is a web ui for this, you can sync them from a remote machine with push/pull commands.  Assuming that URL1 and URL2 represent the two remote machines, you would do the following:

<pre>
fossil clone URL1 syncup.fossil
fossil pull URL2 -R syncup.fossil
# More pulls from other repositories here if more than 2
fossil push URL1 -R syncup.fossil
fossil push URL2 -R syncup.fossil
# More pushes to other repositories here if more than 2
rm syncup.fossil
</pre>

Not much additional network traffic except for the first clone and if the <tt>syncup.fossil</tt> repository is kept around between syncs instead of <tt>rm</tt>ing it (subsequently pulling from URL1 rather than cloning from URL1) network traffic really won't be all that large.  (Of course suitable users and passwords with appropriate clone/pull/push privileges will have to be used.)