Apple today previewed iOS 5, the latest version of the world’s most advanced mobile operating system, and released a beta version to iOS Developer Program members.

The new version features over 200 new features for iPhone, iPad and iPod touch including: “Notification Center, an innovative way to easily view and manage notifications in one place without interruption; iMessage, a new messaging service that lets you easily send text messages, photos and videos between all iOS devices; and Newsstand, a new way to purchase and organize your newspaper and magazine subscriptions.”

Yes, iMessage is Apple‘s answer to BlackBerry messenger. Big moves.

See screenshots of the new features after the click.