Useful? Dunno. http://www.macdevcenter.com/pub/a/mac/2002/09/20/ical_webdav.html ... http://www.brownbearsw.com/ical/icalendarcom.html ... http://www.raptorized.com/2006/08/16/sharing-syncing-and-editing-ical-over-webdav/

At this point do you know if it is a problem with your Perl code or some configuration problem e.g. with the system(s) you are talking to? If the code you have and/or are writing were working correctly (as far as Perl is concerned), would it ... work? Kinda sounds like there is some information missing or not set up correctly such that no WebDAV client (Perl or not) would be successful. There are many things which could be affecting a situation like this so you need to try to reduce that list of possibilities first.