Digital Trends - Apple has set loose iOS 4.3, the latest version of its mobile operating system for iPhones, iPads, and iPod touch devices. The update includes support for mobile hotspot tethering with the iPhone 4, support for iTunes Home Sharing as well as  improvements to Apple’s wireless AirPlay technology, and support new multitouch gestures. Web surfers will also be happy to note the update includes significant performance improvements to Apple’s own Safari browser: according to Apple, Safari in iOS 4.3 runs JavasScript up to twice as fast as previous versions.