James Britt wrote:

> I recently downloaded Sunbird [0], the calendar application from the 
> Mozilla team. It looks OK, seems to do what I want, even at version 0.2.
> 
> It has a facility for sharing or exchanging calendar data.  This 
> requires WebDAV [1], though.  I'd rather not have to run Apache with 
> mod_webdav on every machine where I want to share a calendar.

The user sharing the calendar just needs access to a WebDAV server, he 
doesn't have to run one himself.

 > I looked around but have not seen any Ruby WebDAV server code.

A WebDAV server seems to be a rather big project.