Our organization's main calendar page is comprised of a collection of 20+ Google calendars. These calendars are subject to regular change so I do not like the idea of people downloading and importing static iCal files only to find they have wrong dates later on. I want to encourage them to subscribe to the iCal by its URL so their client manages change updates automatically.
Given the frequency of change and our encouragement of iCal subscription, what's the best way to get this information into peoples' calendars?
Am I thinking about this too narrowly? Are most mail clients (ie mobile devices) designed to subscribe to clickable iCal links?