To start using the new calendar members simply need to sign in to me.com/calendar, click "Upgrade now" in the lower left corner of the Calendar web application, and follow the instructions. However, members who've been using the Calendar since it was a beta product don't need to do anything.
Better iPhone, iPad, and iPod touch integration
Apple says the new MobileMe Calendar was designed to integrate more fluently with the built-in calendar app on iPhones, iPads, and iPod touches by always keeping it in sync with a Mac or PC. New events or changes are automatically pushed to iOS 4 devices so the calendar stays up to date. Users who schedule a meeting on their iOS devices will also see that meeting pushed everywhere too.
Share calendars with family and friends
The new version also makes it easier for users to share calendars with one or more MobileMe members to keep everyone on the same page. For example, users can create a shared calendar called "Family" for weekend activities, then allow family members to edit events, and then receive email notifications informing them of those changes.
Publish a calendar for a group or team
Another new features lets users share a read-only public calendar, which Apple says is ideal for publishing an events calendar such as a child's sports team schedule. Once set up, a link to view the calendar can be sent to other team members for viewing on their iPhone, iPad, iPod touch, Mac, or PC.
Event invitations with RSVPs
Users can also invite guests to an event by adding their email address to the event (they don't have to be a MobileMe member) and guests will get an invitation email they can respond to directly by clicking a link. The event then automatically updates, making it easy to track RSVPs right in the calendar.
New web application
All these features tie into new web application at me.com with redesigned day, week, and month views, as well as a new list view to make scanning events easier.
Apple says the new web application works best with Safari 5, Firefox 3.6, and Internet Explorer 8. Compatibility with iPhone or iPod touch requires iOS 4.1, while iPad users must be running either version 3.2 or 4.2 (due this November). Mac users must have Mac OS X 10.6.4 installed and PC users will need MobileMe Control Panel version 1.6.3 and Outlook 2007 or 2010.