Face Training will come with a digital camera module you fit into the DS' Game Boy Advance cartridge slot. The camera tracks your face while you perform the game's prescribed exercises. While the camera seems to be intended specifically for this game, it offers a lot of potential for other uses. With the DS' Wi-Fi Internet capabilities, a camera accessory could easily turn the little handheld into a digital camera or even a Webcam that can send photos directly to your computer via e-mail. Of course, this is all speculation, and the little camera might be fated only to help you tighten up your face.
Either way, you'll have to go to Japan to pick it up any time soon. Face Training ships August 2, but only in Japan. Nintendo hasn't made any announcements about a U.S. or Europe release.