I'm not sure anyone is even using this as there have been no complaints, but...

... the previously borken[1] iCal feed should now be working:

http://nobmob.com/calendar/ical

Or substitute 'nobmob.com' for your favourite Global Riders site[2]

This should show the last week, plus 90 days into the future. As I imported this a Google calendar to test though, and as Google shares imports, on Google it's only showing this month at the moment. Should change on their next refresh.

[1] This is a deliberate typo