I'm very interested in this too, eg for tracking ZWiki page revisions. I'm willing to help work on it if anyone comes up with a good approach.. ? My vague plan #1 was to look for a python cvs module, eg whatever ViewCVS uses, and build a zope product that maps a cvs repository into the object namespace, as localfs does with files. Or, vague ambitious plan #2: build a real cvs server that stores its data in ZODB. I expect someone out there has thought more deeply about this - please comment. -Simon