Apple to Hold Early April Media Event for iOS 5 and MobileMe Revamp?
Attendees waiting outside Apple's iOS 4 event on April 8th, 2010
German site Macerkopf.de claims [Google translation] to have received word from a source that Apple is planning an early April media event to introduce iOS 5 and revamped...
http://www.macrumors.com/2011/03/08/apple-to-hold-early-april-media-event-for-ios-5-and-mobileme-revamp/