IOS 4.2 released

Since yesterday, 18h, the latest release of IOS which is 4.2 is officially available for downloads.
New features :

• AirPrint: print email, photos, web pages, and documents right from  iPhone, iPad, or iPod touch.
• AirPlay: stream digital media wirelessly from your iPhone, iPad, and iPod touch to your Apple TV and AirPlay-enabled speakers.
• Find My IPhone: helps you locate your missing device and protect its data — is now free on any iPhone 4, iPad, or fourth-generation iPod touch running iOS 4.2.