Anybody running this? I've been testing this under Linux, and so far it seems to work well with Sunbird (although Sunbird lacks refinement as a 0.3 client). The only other CalDAV server I know of is Cosmo, but I've found the client that works with it (Chandler) to be even buggier than Sunbird.
At any rate, I'm pleased to finally have the ability for subscribers to write to calendars. Now, I can write to my same personal calendar from both work and home, this seems to work well.
My intention in posting this was to talk about Calendar Server, not to plug my new blog, but for those of you that would like to learn more about my experiences running Calendar Server with Mozilla Sunbird, you can read about this here:
NetMusician Labs � Blog Archive � Sharing personal calendars, allowing subscribers writable access
For those of you who don't know, iCal in Leopard will be CalDAV compliant and will work with Calendar Server. We are fairly assured to have a solid client by 10.5, although for now Sunbird seems to do the trick for me.