You can follow the main calendar from your iPhone or Android phone or Outlook/other mail program.  Here are the links that you need to use:

iCal:
http://www.google.com/calendar/ical/hunterswimming.org_9jtftb8u5o7ru4uvtpcb120v40%40group.calendar.google.com/public/basic.ics

HTML:
http://www.google.com/calendar/hosted/hunterswimming.org/embed?src=hunterswimming.org_9jtftb8u5o7ru4uvtpcb120v40%40group.calendar.google.com&ctz=America/Denver

XML:
http://www.google.com/calendar/feeds/hunterswimming.org_9jtftb8u5o7ru4uvtpcb120v40%40group.calendar.google.com/public/basic