looks like there are more widgets to make sync'ing/subscribing to calendars easy (easier). for example, you can 'subscribe' to my current burn calendar for 2007, using this address:
http://www.7hertz.com/download/calendar/2007/burn2007.ics
i've just been playing around with this stuff a bit, but here's how:
windows/outlook:
for outlook 2003/2007 there's a plug-in called 'remotecalendar' (posted on sourceforge), and lets you sync with calendars on the web (e.g. sync to google calendars, subscribe to the 'burn dates').
macs:
on the mac, the 'ical' program lets subscribe to a remote calendar. just choose 'subscribe', use the url for the calendar, and choose a refresh rate. there's also some software called 'spanning sync' which will let you sync as well.
google calendars:
download, then import into gcal.
palm:
try a program called isync?