There’s still a lot of features and details being revealed in the leaked Windows Phone 8 SDK, and one of the latest is voice dictation in the Email app. During the reveal at the developer summit we saw a much improved speech interface demoed. Other than that though, this is one of the first looks at speech used in a native application.
Also note from the screenshot above that the email app complies with the light or dark theming choice of the user, at least in the overview screen. Although in the post from WP7APP.DE, they make mention that readability is down with the dark background. Check out the screen cast of the feature working on the emulator below. Of course it’s in german but you get the gist.