Nintendo has filed an application to trademark the name Wii Relax in the US.
The application covers a wide range of possible uses for the name - it could refer to all manner of software or peripherals. But there's plenty of speculation it could have something to do with the Vitality Sensor accessory, particularly since the patent mentions "parts and accessories of consumer videogame apparatus, including those with pulse-measuring functions".
Nintendo also trademarked the Wii Relax name in Europe last year. Hmm.