In one of the more impressive demonstrations during the iPhone 3G S introduction, Apple showed off a new feature -- Voice Control.
To activate it, you hold down the "home" button (previously reserved for "force quit"). When you hear the sound, you're good to speak!
It can be used to make a call by saying either the name or number. Voice Control will repeat what you say for confirmation.
It can also be used to tell the iPod app to play a song, play a playlist, shuffle, activate Genius, or even tell you what song is currently playing.
Most impressive? It will be available in a ton of languages! (See full list after the break!)