The outage lasted 11 days before service was fully restored.
In reaction, Jobs shook up Apple's executive table of organization, and handed the service to Eddy Cue, who already led the company's iTunes and App Store properties.
Cue is currently Apple's vice president of Internet services.
What price Apple will charge for iCloud is unknown, although analysts generally believe the company will offer some part of it to customers for free.
Late on Monday, Apple filed a trademark application for iCloud with European Union regulators, but the U.S. Patent and Trademark Office indicates that in the United States "iCloud" remains a registered trademark of Xcerion.
The WWDC keynote, which is slated to start a 10:00 a.m. PT next Monday, will also preview Mac OS X 10.7, aka Lion, and the next version of Apple's mobile operating system, iOS 5.
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