The deep Twitter integration into iOS 5 says that Apple is happy to let others do the foundational legwork in that domain. The fact that there is no public Photostream, for example, that you could publish to certain audiences, speaks volumes to Apple's conservative approach to the iCloud rollout.
Conceptually, it may be a lot to thrust on a user all at once that iCloud is not only your own personal magical data synching tool, but that it also publishes your data to others, which has data privacy implications. Maybe a gradual roll-out of social features gives time for people to be comfortable with using the existing features without worrying about the social implications of their actions.
Conceptually, it may be a lot to thrust on a user all at once that iCloud is not only your own personal magical data synching tool, but that it also publishes your data to others, which has data privacy implications. Maybe a gradual roll-out of social features gives time for people to be comfortable with using the existing features without worrying about the social implications of their actions.