Apple announces iOS 5: Brings revamped notifications, Twitter integration, iMessage and more

Apple today finally unveiled the details of the next version of its mobile operating system, iOS 5, at its Worldwide Developers Conference keynote this morning. Confirming many previously rumored features, Apple showed off a revamped notification interface, Twitter integration, an improved messaging app, as well as a slew of other features.

Rumor roundup: What will Apple announce at WWDC 2011?

Apple is gearing up to kick off its Worldwide Developers Conference Monday morning, so it’s no surprise that the Apple rumor mill has been in full effect this weekend. We already know that Apple will discuss iOS 5, Max OS X Lion, and iCloud at WWDC, but the specifics have so far eluded the tech community.