Want the world to follow the ups and downs of your body weight in real time? A French company has just the product for you: the WiFi body scale, equipped with a wireless connection to post your weight and body fat to your Web page and iPhone—and to tweet them automatically to your Twitter followers. "What's next?" in the world of embarrassing apps, wonders David Colker in the LA Times. "An app to let the Twitterverse know how much debt you're carrying?"