Hi, 
we just tried org-caldav and it seems to work very nice.
We use Sogo http://www.sogo.nu/ and hence David might like to ad Sogo on the list of possible caldav servers.
We will test further and report problems and success ;)
Thumbs up. For me org-caldav is a new success story of org-mode, please try to get it into the org-mode standard package :)
Any plans to sync tasks too?
 
Greetings 

Torsten

CC. Since Sogo does not allow a print view. Does someone know how to create a printable weekly calendar which contains org-agenda entries?
I barley remember there was a possibility to create a PDF but can't find it anymore