I would like to what is described in this and this thread. I translated the Japanese thread and they aggree it is a good idea but don't have a solution. I wonder if anyone in this forum has made any progress since these threads?

I currently use iCal (OSX) and dav to generate .ics files. Other iCal users can subscribe to my calendar and events are automatically updated when I change them in iCal. It would be very nice to allow visitors of my site to subscribe to all events in piCal events using iCal, Sunbird or Outlook.

Like the original poster I do not care about groups and permissions for this.

Thanks