hi michi, i think there is a difference between syndicating defined content (at the end of a workflow) to subscribers (which i think is what a cms should do) and synchronizing two repositories.
when it comes to synchronizing repositories, i think there are some very interesting options for repositories. for example a repository could expose an md5 as a property that displays the hashcode of all the properties and "childnodes' hashcodes". this would allow for a very network and cpu efficient synchronization of two repositories. regards, david
