iCal4Outlook is a utility for importing & exporting appointments form/to iCal-files for MS Outlook. Various options cover the needs for the exchange of events with different applications & installations, like iCAL (Apple), Sunbird or Websolutions such as Webcalendar, Google calendar. Supports UTC/VTIMEZONE and allows you to choose the timezone-difference manually. Does not use CDO. Currently in Beta. Donationware.
You can get detailed information about connector on the product page http://ical.gutentag.ch