iCloud received a small update overnight, adding two new webapps -- Notes and Reminders -- and improving others, including Mail and Find My iPhone.
Notes and Reminders look just like their Mountain Lion and iPad counterparts, syncing your data to the cloud and then down to your iPhones, iPads or other devices. The Mail webapp now includes VIP mail, just as in iOS 6, and has a slightly different interface. Find My iPhone has added "Lost Mode," an iOS 6 feature that will send a number to your phone so the person that found it can easily contact you. Head over to iCloud.com to check out a full list of the new changes.