Zimbra Calendar and sync

I ran into a brick wall with my integrated family calendar project. I probably have to wait and see if Google implements Outlook synchronization, but I see that Zimbra Calendar has an Outlook Connector. This blog has more discussions, I'll try following it for a while.

I liked this claim:

... Zimbra, the enterprise, open-source-based Exchange competitor that runs e-mail services on top of Mac OS X and a variety of Linux flavors, already with over-the-air (OTA) sync to all popular PDAs, and quality desktop connectors to sync iCal, AddressBook, Entourage and Outlook, has now released the very early version of their own Desktop Client.

So if I were to run Zimbra on one of my ISPs ....

Update: Ouch. The sync stuff requires the very expensive non-open source solution. Ok, forget that ...