There's a lot Nintendo still needs to explain about their upcoming Vitality Sensor peripheral, which was announced at E3 and then plunged into media darkness. Like how it'll be implemented in a game, or what upcoming games will even support the device.
During some European trademark probing, Siliconera discovered that Nintendo had secured the rights to "WiiRelax" for PAL territories. Which sounds like a pretty good fit for a vitality-sensing game.
Of course, this could just be an instance of Nintendo covering their bases as they've been known to do. But with titles like Wii Fit, Play and Sports, "Relax" seems like a logical introduction for the peripheral. It would certainly fit the naming convention.