WWDC 2011- iOS previewed, so many new features(with Apple official video)

The expected preview of the most awaited release the iOS 5 was finally previewed at the WWDC.
The new release has more than 200 new features, some of the new features in the release are:

• New Notification Center, lockscreen notifications
• Newsstand, for magazine and newspaper feed subscriptions
• Improved Twitter integration, with a single sign-in, and native support for image tweets
• Safari Reader feature for image free browsing, and Reading List bookmarking feature
• Tabbed browsing
• Improved Reminders, with location based reminder, and synching
• New touch camera button on lockscreen, new shutter function for volume up key, new long-press for optimization, as well as new image editing options
• New split onscreen keyboard
• Synching, activation, and updating all sans PC, all wireless and on device

The iMessage and the iCloud services were also previewed to the attending developers.