Honestly, I don't really see the point ... Achievements are designed to be geek-cred and every game is forced to support them ... Miis (I suspect) are going to be used in a wide variety of (possibly inexpensive or downloadable) games ... I could be wrong, but it doesn't sound like this has the geek-cred direction of the XBox 360's achievements nor does it sound like it has the practical application of Miis ...