The Kinect patch for The Elder Scrolls V: Skyrim is finally available today, and Bethesda is kind enough to reveal all of the voice commands in a handy pdf guide that you'll have access to once you enable Kinect in the game.
I'm actually quite tempted to use the Kinect for Skyrim, instead of, say, Mass Effect 3 because of how much menu surfing is required in the Xbox 360 version of the game. Not only can you quickly save or go to the map with one voice command, but you can also equip a weapon or spell withou having to go through a long favorites list. It essentially provides a hotkey voice command option, whereas the favorites list just has two slots for shortcuts.
You can also sort items by name, weight, and value, as well as give commands to your follower anywhere instead of having to approach the follower and give them commands. You can even set a loot item value-to-weight ratio... yeah, they've pretty thought about everything except for a command for summoning thousands of cheese wheels.
And of course, you can scare your neighbors with your fluency in draconic shouts.