ZSyncer is already great at this stage for syncing two Zope instances. IMHO many people would like these features: - Ability to sync ZClasses. Right now, ZSyncer gives intimidating errors when entering ZClasses. - Ability to only sync certain metatypes, such as [dtml-methods, Python Scripts, ZSQL methods]. When you need to update a live site where majority of ZODB contents are DTML documents and instances of ZClasses that were created by live site visitors, you don't want to disturb that. You only want to sync methods and scripts. (additional advantage would be a significant speedup. The time that ZSyncer takes to scan the Zope root is quite significant over regular 40kbit modem connection. -- Milos Prudek