Eric Slivka:

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.

The original story is at WSJ, but that story is for subscribers only, so enjoy it at Mac Rumors.