Apple Online StoreApple has posed an online preview of iOS 4.2 for iPad, iPhone, and iPod touch:

iOS 4 is the world’s most advanced mobile operating system. And soon iPad owners will get to enjoy its 100+ new features and innovations — including multitasking, folders, printing, and more. Look for iOS 4.2 coming in November for iPad, iPhone, and iPod touch.

Features include:

• Multitasking: Run all your favorite apps — and switch between them instantly — without slowing down the performance of the foreground app or draining the battery unnecessarily.2

• Folders: Organize apps into folders with drag-and-drop simplicity. Get faster access to your favorites and browse and manage thousands of apps.

• Wireless Printing: Print mail, photos, web pages, and more directly to a printer on a wireless network.

• AirPlay: Wirelessly stream videos, music, and photos from iPad to the new Apple TV, and stream music to AirPlay speakers or receivers, including AirPort Express.

• Game Center: Experience social gaming on your iPad. Find friends or use auto-match to play multiplayer games against new opponents. Track achievements and compare high scores.

• Even better Mail: See messages from all your accounts in a unified inbox, organize messages by threads, and open attachments in third-party apps.

• Find text on web pages: In Safari, easily find and highlight specific words and phrases on large web pages.

• Enhanced enterprise support: Businesses can take advantage of stronger security features, new device management capabilities, and improved enterprise integration.

• Accessibility enhancements: Control VoiceOver using a wireless keyboard. Output in braille to over 30 supported wireless Bluetooth refreshable braille displays in more than 25 languages.

• Keyboard and dictionary enhancements: Choose from more than 30 new keyboards and dictionaries, including Arabic, Greek, and Hebrew.

See it with screenshots here.

MacDailyNews Take: Folders cannot arrive on our iPads soon enough!