When the iOS 5 Notification Center was unveiled by Scott Forstall at WWDC, the possibility of third party widgets was also teased to developers. Although no public SDK for widgets was announced by Apple, the first, non-Apple widget has been successfully added to Notification Center, thanks to the RedSn0w tethered jailbreak that recently got updated for iOS 5.
Developer WillFour20 was able to dig into a jailbroken version of the iOS 5 SDK. He uncovered the ability to add his own widget, and he demonstrated it with the above: "Hello World." Thanks to this discovery, developers with jailbroken iDevices will be able to start developing and testing widgets for iOS 5...