Here's a non-trivial solution, if you are using Outlook 2003 at work:
a) use RemoteCalendars (
http://sourceforge.net/projects/remotecalendars/) at work. It's an open-source tool that will publish your Outlook calendars in iCalendar format.
b) signup with a calendar sharing service like icalx.com or ifreebusy.com (disclaimer: ifreebusy.com is my site), and publish your calendar from work to the site
c) on your home computer, use iCal to subscribe to the published work calendar. You can also view your work calendar via a web browser.
It's not true calendar sharing - you won't be able to make entries into your work calendar from home, but at least you will be able to view the work calendar data in iCal.
HTH
Neil