Just as the clickity-clackity sound of the humble typewriter was superseded by the tip-tap of the PC keyboard, could we soon replace even this staple PC accessory with merely the power of our voices? That's more-or-less the idea behind the Dragon NaturallySpeaking 11 Premium speech recognition software from Nuance, offering advanced dictation and hands-free PC navigation controls. Is it time to unplug your keyboard and warm up your vocal chords? Read on to find out