Clio

Gone are the days of needing an intermediary application such as iCal to push subscribed calendars to the iPhone. As of the recently released iPhone 3.0 update, users can now subscribe to calendars directly from their phones using one of two protocols: CalDAV—supported by Google and Yahoo—and subscriptions via the .ics format—which is what Apple uses in iCal, and what Clio uses for its calendar feeds. This will undoubtedly be a huge relief to many Clio users who, until now, have patiently performed regular synchronization to ensure the latest updates are reflected on their iPhone calendars. Now, with direct-to-phone iCalendar subscriptions enabled, users can be reassured that they’ll always have the latest appointment information close at hand, and without the need for cumbersome interventions.

Rene Ritchie over at the iPhone Blog has posted a great overview of how to add calendar subscriptions (such as your Clio calendar) via the new 3.0 interface. The full article can be read here: http://www.theiphoneblog.com/2009/06/24/iphone-30-easily-subscribe-holidays-sports-team-schedules-movie-release-dates/