IOS 4.3 Beta 1 Features

Following news that iOS 4.3 beta 1 has been seeded to developers, Apple’s servers are no doubt being hammered by anxious developers looking to explore all the new features. We pinged a few of our dev friends for feedback on new additions they’ve found and here’s what we have so far:

Personal hotspot capabilities for GSM devices — as we exclusively reported earlier today
AirPlay support for third-party native apps and third-party Web apps
Redesigned FaceTime icon
Multi-touch gesture support for iPad — “This beta release contains a preview of new Multi-Touch gestures for iPad. You can use four or five fingers to pinch to the Home Screen; swipe up to reveal the multitasking bar; and swipe left or right between apps. We are providing this preview before releasing them to the public to understand how these gestures work with your apps.”
Configurable slide switch for iPad — users can now decide whether the hardware switch above the volume rocker on the iPad controls mute or rotation lock
iAd full screen banners on the iPad — bigger ads… just what iPad users have been clamoring for
Interestingly, iOS 4.3 appears to also have dropped support for Apple second-generation iPhone — the iPhone 3G — and its second-generation iPod touch. This could make the current build Apple’s final software release for these devices.

UPDATE: Several readers have emailed us to point out that enthusiast blog iSpazio may have uncovered a little gem. References to the following effects have been found in the iOS 4.3 code, and they might be introduced as live video effects for video capture and FaceTime calls:

Thermal Camera
Tunnel of Light

Update 2X: 
iOS 4.3 beta 1 for iOS mobile devices and Apple TV seeded to developers.
Multi-Touch gestures to the iPad.
IOS 4.3 will not support the iPhone 3G or iPod touch 2G.
GSM iPhones will get the Personal Hotspot feature with iOS 4.3 (AT&T is a go).
FaceTime gets a new icon and iAds can now display in full-screen.
iOS 4.3 brings the physical screen lock switch back to iPad (is an option).
iOS 4.3 may bring fun video effects to the iPhone/iPod touch camera app.
iOS 4.3 brings new Messages alert settings and a new font in notes.

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