I can publish the calendar to webDAV so that everyone can have access to it. But Sunbird .31 seems to be pretty buggy. Anything else to use to read and display the .ics file? I read that Outlook could ...

If you’re a Google Calendar user, you may have had issues adding events to your calendar when someone sends them to you attached to an email in iCal format (the files usually looks like “invite.ics”).