I just installed the Zimbra Desktop (the latest version from the Zimbra downloads page). I told it to connect to my corporate ZCS server and all my emails appeared before me, great.
However, I get a blank calendar. Does the ZD product sync your calendar from the ZCS NE server? If not, then I don't really see the point in this product.
Oh btw whilst I'm at the rants, the help button in the ZD product (top right) goes to a 404 not found.
Otherwise, it's the start of a promising product. Would be nice to see IM supported like it is in the NE web client.