Accenda's iPod Voice Controller lets you control your iPod by speaking commands without ever having take off your gloves again in the wintertime for $79. Let's be truthful here: it's just great for being lazy.
All you have to do is plug in your headphones into the Accenda Voice Control jack, and then plug that into the iPod dock connector. You can even put it on a neck strap or use the label clip. There you can activate it using voice functions. Even though its primarily targeted toward English-speaking users, it can be trained to recognize commands in other languages and people with strong accents. It can work with the iPod Nano (1G, 2G, 3G) iPod Touch, iPod Classic and all other older devices. Even though it will listen to you, too bad there's nothing to stop anyone else from listening to you and thinking you're a freak. [Accenda Voice Control via OhGizmo]