"Affected customers will still receive iCloud and MobileMe email, but new messages will be downloaded to their devices when the Mail app is opened, or when their device periodically fetches new messages as configured in iOS Settings. Push email service on desktop computers, laptop computers, and the web is unaffected, as is service from other providers such as Microsoft Exchange ActiveSync," says Apple on its official support page.
Apple and Motorola Mobility have been battling over patents in Germany a lot lately, with Apple complaining (and, so far, winning the argument) that Motorola infringed on Apple’s patents on slide-to-unlock.
On the other hand, Motorola recently won permanent injunction against Apple's iCloud in Germany, which caused the current iCloud and MobileMe downtime.