The bould Aidan Creaner had the smart notion of putting the calendar up as a public calendar on Google Calendar so that people could subscribe to it. So I spent a merry hour or so doing just that. However, it would appear that Google in their infinite wisdom have taken away the option to search for public calendars which will make it a little difficult, I would have thought, for people to find it.
If you use iCal or anything else that works on .ics format, the address to subscribe to the feed is:
In Google calendar, click the triangle right of “Other Calendars” in the sidebar, click “Add by URL” and paste the address in.
In iCal, go Calendar > Subscribe, and paste the address in the box.
You can also view it in your browser.