The latest training game to use this naming convention is Walk with me! Do you know your walking routine?, which we know as Personal Trainer: Walking, the walking trainer that brings Miis to the DS for the first time, and also includes two wireless pedometer accessories. That accessory is known as the Activity Meter for the PAL release. Data collected by the device can be sent to Nintendo via Wi-Fi for use on leaderboards and a total worldwide step count of all users. The press release says that the data is transferred to your DS via infrared signal, but we're a bit skeptical since the DS doesn't have an IR port.
Nintendo of Europe will launch Walk with me! on February 20. You can see English screens in an obtrusive Flash interface at Nintendo's Walk with me page.