The new features, expected to be announced at Apple's world-wide developer conference beginning June 11, will allow iCloud users to share sets of photos with other iCloud users and to comment on them, these people said. Currently, users can only store one set of photos in iCloud through a feature called Photo Stream, which is designed to sync those photos to other Apple devices, not share them.
In addition Apple is said to be working on a feature that will let users sync their videos using iCloud.
Last Friday, a beta version of the iCloud website revealed icons for "Notes" and Reminders", indicating that the two apps would be coming to the site soon.
The update to iCloud is expected alongside iOS 6 which will likely make its debut at WWDC 2012.