Are you experiencing problems with Photo Stream, Documents in the Cloud, iCloud backup?
Multiple iCloud Services - Some users affected
Users are experiencing a problem with the services listed above. We are investigating and will update the status as more information becomes available.
Looks like it started around 4:30 am and persists. If you're having issues, let us know in the comments, and when things clear up, let us know that as well. If you want to keep track, hit the link below.
Source: System Status