updated 12:25 pm EDT, Tue September 11, 2012
Outage hit in early morning
Some iCloud users have encountered a lengthy downtime for the service's Mail functions, according to complaints and Apple's status monitor. The monitor shows that problems began at about 2:16AM Pacific time, but as of 9:25, troubles are still ongoing. Apple estimates that about 0.17 percent of iCloud users can't reach Mail.
iCloud has been occasionally experiencing minor outages since it debuted last year. Apple will need the service firing on all cylinders in the next few weeks, as the company is expected to announce a new iPhone tomorrow, and may also be prepared to release iOS 6 to the public.