iOS 5 Downloadable available from October 12
The new Notification center in iOS5 is highly inspired by the Android notification system, except that it looks much better and functional. Other than this, iOS5 also has a new messaging system for iOS users, iMessage. This new service will allow iOS device users to interact with each other for free. iMessage has the potential to be a true BBM killer.
Despite of it, iOS 5 brings over 200 new features and interfaces in the iPhone, iPod Touch and the iPad.