According to his LinkedIn Profile, John Herbold has left the iCloud.  On his departure, he said:

I’ve been fortunate enough to define, ship and market a variety of products for one of the world’s most admired product companies. That opportunity was a great privilege.

Now I get to take that experience and apply it to the enormous challenge of materially improving youth health.

He is the third prominent Apple employee to leave the company in recent months (though much less so than the others), following MacOSX head Bertrand Serlet a few months ago and Stores leader Ron Johnson last week.

He was at Apple during the MobileMe rollout and managed to stay almost until the iCloud announcement this month.