Ben, take a look at the
Mozilla Calendar. It uses iCal compliant calendar objects and shares calendars via WebDAV.
That is, a user creates her calendar using the desktop MozCal app, then uploads it to a WebDAV server. She can then allow other users to view her calendar by giving them permission. She can view an arbitrary number of calendars this way.
Here is the quote from the FAQ
To share your calendars, you need access to a webDAV server. If you run your own web server, you can install mod_dav, a free Apache module that will turn your web server into a webDAV server. Instructions on how to set it up are on their website. Once you set up your webDAV server, you can publish your calendar to the site, then subscribe to it from any other Mozilla Calendar. Automatically updating the calendar will give you a poor man's calendar server.
This seems like an elegant, easy solution for you in a way that is compatible with OACS. nsDAV should be ready soon, and integration with OACS will come shortly after that.
talli
