Apple today announced that iOS 4.2 will be released today for the iPad, iPhone, and iPod touch, bringing iOS 4 features to the iPad for the first time.

Apple today announced that iOS 4.2, the latest version of the world's most advanced mobile operating system, is available today for download for iPad, iPhone and iPod touch. iOS 4.2 brings over 100 new features from iOS 4.0, 4.1 and 4.2 to iPad including Multitasking, Folders, Unified Inbox, Game Center, AirPlay and AirPrint.

"iOS 4.2 makes the iPad a completely new product, just in time for the holiday season," said Steve Jobs, Apple's CEO. "Once again, the iPad with iOS 4.2 will define the target that other tablets will aspire to, but very few, if any, will ever be able to hit."

Apple also announced that its Find My iPhone feature designed to assist users with locating lost iOS devices is now available to all users of Apple's current-generation iPad, iPhone, and iPod touch free of charge. The feature had previously required a paid MobileMe subscription.

iOS 4.2 has not yet appeared for download through iTunes, and Apple has not offered an exact time for the release.

Update: According to Macworld, Apple has said that iOS 4.2.1 will be released "by 10 a.m. Pacific Time".

Update 2: There seems to be some confusion over whether the free "Find My iPhone" service is limited to current-generation hardware or if it extends to all devices capable of running iOS 4.2. Apple's press release appears to clearly state that the feature is limited to current-generation hardware:

The free Find My iPhone feature is available for iPhone 4, iPad or new iPod touch (4th generation).

Apple's newly-updated Find My iPhone setup page suggests, however, that current-generation hardware is only required to set up an Apple ID for access to the service, with the actual service potentially then being available on all iOS 4.2-compatibile hardware:

Create a free Find My iPhone account on any iPhone 4, iPad, or iPod touch (4th generation) running iOS 4.2. Once you create an account on a qualifying device, use your Apple ID and password to enable Find My iPhone on your other devices running iOS 4.2.

Update 3: Macworld also reports that an update for the new Apple TV will arrive today as iOS 4.1, enabling AirPlay functionality and VoiceOver.