Apple's MobileMe Calendar is out of beta and is now available to all MobileMe members, according to a news post on Apple.com.
The new Web application offers redesigned day, week, and month views. A key feature in the latest version of Apple's calendar is the ability to push new events or changes to events to mobile devices, including the iPhone, iPod touch, and (soon) the iPad. MobileMe calendar syncs with Apple's iCal application, and PC users can also use it to sync with their Outlook 2007 and 2010 calendars.
MobileMe calendar also offers the ability to share calendars with family and friends, granting the right to make edits to the shared calendar and receive e-mail notifications when changes are made. You can also set up a public read-only calendar, too, for times when less interactivity is appropriate. You may want to let your family edit entries on a vacation you're all taking together. You may not want to let the kids on the soccer league you coach change the times on the practice and games schedule you set up.
The app also handles invitations and RSVPs; add an e-mail address to the event and an invitation is automatically sent via e-mail. Invitees can RSVP by clicking a link, and their answers are tracked in the event listing.
The new version of Mobile Calendar requires iOS 4.1 for the iPhone and iPod touch. Apple iPads need to be running iOS 3.2, though push calendar updates will not be available for the iPad without iOS 4.2, which is scheduled to be released in November, according to Apple. Instructions for upgrading to the new version of MobileMe Calendar can be found on Apple's Web site.