I happen to be. im upgrading for the faster Safari, iTunes home sharing, and overall improved system performance and battery life. Im on an iPod touch 4G 8GB so the home sharing is a biggie plus i have awful battery life on 4.2.1. i also like the new FaceTime icon, unlike the generic 4.2 icon. so what about you guys and girls? Will YOU be updating to 4.3? and if so, why?