I followed the wiki entry.
The url I'm using is
https://nameof.zimbra.server
I have everything 'zimbra' running over https.
This seems to be similar to the issue here:
problem with caldav and leopard
bug:
Bug 23671 - iCal / Leopard CalDAV not showing all subscribed (shared) calendar entries
With 1 difference. I can see the shared calendars in iCal, they just dont sync to my iPhone via iTunes. In fact ,when I have the shared calendars in iCal, syncing seems to break entirely.
David