We've plan to create a direct integration of Alfresco into zimbra. I've already tested the alfresco zimlet but found that its very buggy and not production ready for several reasons. I would rater build a solution which replaces the datastore in zimbra with a "redirector" to alfresco.
Is there any documentation about the document store implementation in zimbra and how to extend it to external storage such as alfresco? Or can I get some help in implementing this? The solution will be released under the GPL.
Thanks in advance