TechCrunch reports that iOS 5, expected to debut at WWDC next month, will feature a "completely revamped" notification system and widgets. Apple has long been rumored to be revamping its notifications system in iOS, and many have expected that such a notification system revamp would make its way into iOS 5.
The widgets functionality is somewhat a new concept, however. Besides TechCrunch's mention that there will be iOS widgets, nothing else is known about what they'll look like or what function they'll perform. MacRumors