iOS 4.3 beta 1 Download Released for Developers
Apple has just released the first iOS 4.3 beta as build 8F5148b for the iPad, iPhone 4, iPhone 3GS, iPod touch 3rd and 4th gen, and Apple TV. Noticeably absent from the iOS 4.3 beta IPSW list are the iPhone 3G and iPod touch 1st and 2nd gen models, suggesting that Apple will no longer support the older iOS hardware.
iOS 4.3 is confirmed to bring the wireless Personal Hotspot to iPhone, although it is still unknown whether AT&T will support this feature.
If you are in the iOS development program, you can get immediate access to the iOS 4.3 beta by going to the iOS Dev Center .