You can subscribe to a calendar of the scg via:
webcal://asterix.unibe.ch/ical/foo.ics
where foo is the name of the calendar.
See also the list of all known scg ICal Calendar Publishers
Use Mozilla Calendar
Browse to http://www.designtheworld.com/iwebcal/ and put the full qualified name of your calendar. (see above)
Bookmark the resulting page. Take care though, they might put your calendar as an example (What people are doing with our great software...) on their webpage.
You can also publish your calendars with ical, if you choose
You must also specify the login and password! (ask the Password Keeper)
Be sure to drink your Ovaltine.