As we continue work on the Zimbra backend, it is coming more clear to me that we need some way that users can customize exactly what they want pushed to their device and how.
A Zimlet would be nice but involves a lot. What I envision that is what I think a simple solution is a PHP web page that the user logs into (verified against their ZImbra account), allows them to see all their folders in Zimbra (using SOAP to pull this information), allows the user to select which folders to include/exclude, and allows the user to set a few other options. All this information would then be stored in an XML file that the backend would load and use.
If you are a PHP developer who would like to take the lead on this, please contact me.